Work Text:
Over the last few hours of a busy Halloween night Katsuki had worked his way down a packed street with the group of less-than-covert heroes he was out with. The little kids that came up to him while he was patrolling had better fucking outfits than the several dozen Dynamight costumes he’d seen tonight. Maybe it was flaring alpha instincts that felt pride in any kid who admired the country’s number one hero, but it was personal disappointment that at this point he was sick of seeing the poor replicas of himself out and about.
He hid a sneer as he watched another Dynamight pass with a sip of the atrocity Kaminari handed him a few minutes ago. This Dynamight, like most of his other little copycats, was wearing the same shitty store-bought costume. He knew they were expensive as hell yet were made of cheap uncomfortable fabric, missing costume pieces, flimsy gauntlets, and usually already bent headpieces.
The guy who’d just passed hadn’t bothered buying the additional, also expensive, also shitty blond wig that was sold alongside the costume. He wore bright red shoes that stood out horribly against the black outfit and must have already lost his gauntlets somewhere. Katsuki probably was only so insulted because the Dynamight’s partner was a pretty lady who wore a carefully crafted “Shouto” costume.
Similarly, the only costume he’d been semi-proud of earlier was also a woman, wearing an orange X bra and short shorts that were still clearly his costume. At least she’d worn a blonde wig and seemed to have built the well-constructed mask on her own. She was the only person he’d seen wearing the belts and straps he normally had on… Katuski wasn’t going to think too much about how well they looked as a harness though.
The red-shoed idiot continued though, thankfully moving further down the street instead of into the current bar Katsuki was leaning against a patio railing in front of. Unfortunately, the pairing also seemed to have been spotted by someone else.
“Do you think I should grow my hair out? It looked good long.”
Katsuki turned his wig-heavy head to look at the mummy leaning against the railing beside him. A normally quiet companion that also wanted to avoid the cackling group a few feet away from them. There were tufts of short white and red hair poking out between the bandages on his head that would have been even harder to hide if they were long like the Shouto who just passed them.
“It’ll get in your face while you’re fighting, and fuck up your performance. So yeah, go ahead, I’m sick of you riding my ass in the hero rankings,” Katsuki replied rolling his eyes before even looking over at the number two hero.
One blue eye looked back at him, the other wrapped in the bandage. Apparently, Kaminari had told him blue-eyed stares were scarier than gray ones.
“I liked it,” Shouto said back like that was more important than a hero ranking. Although they both knew well enough it’d take a lot more than that for anyone to catch up to them right now.
“You should switch your outfit to the shorts too,” Katsuki said. Katsuki could tell from the sparkle in Shouto’s eye he thought it was funny at least.
“Holy shit… look at that one,” Kirishima said, tapping his foot against the side of Katsuki’s. Katsuki didn’t even know when Kirishima had turned away from the group to look at them.
Katsuki obliged and turned to seek out what he was being directed to. When he spotted another set of orange spikes he didn’t have much hope. He could see them wading through people across the street from their current bar. Whoever was wearing them though was short enough Katsuki only caught glimpses. But he did see a flash of gauntlets that actually had some shape to them and a pair of accurate-looking boots between a sea of legs.
They were all hints to the artistry that had finally come out of the crowd well enough to be fully appreciated.
Half the people out that night were in some of the shittiest, straight-off-the-shelf costumes you could get for Halloween. The fabrics were thin and barely held together as they stretched around body parts that everyone had but the shitty designs and shitty material couldn’t handle. Sero’s cheap ass Spiderman costume was literally ripping open at the seams to accommodate his shoulders after already being cut into a t-shirt to accommodate his elbows. The same store where Sero bought his outfit sold Dynamight costumes too. The person Katsuki had his eyes set on now clearly didn't buy his there.
A top that clung to the torso and arms of the man wearing it, tight against his skin like it should be. He had on large gauntlets that looked solid and real, down to the details in the handle and the grooves of the giant support items. He had on the proper shoes, kneepads, and mask. He was wearing a wig styled to look exactly like Katsuki’s hair and had an exact replica of his mask.
Katsuki would have been worried the guy had stolen the costume from him because of how good it looked, except it was not slightly in Katsuki’s size. It had to be custom-made because the only thing that stood out as incorrect to Katsuki was how damn short the guy wearing the outfit was. At least half a foot shorter than Katsuki, likely more because as the crowd parted Katsuki could see that the lift of the heavy boots the man wore was much higher than Katsuki's own.
The man's cheeks were rounder under the edge of Katsuki's mask than Katsuki’s sharp face, and the makeup the man had on was more carefully applied than the black Katsuki slathered over his eyes before going out on patrol or to a fight. Katsuki wondered if the guy was an omega, an assumption based on his size, and then questioned why he cared either way.
"There’s vanity, and then there’s whatever’s going on in your head right now. You look like you’re gonna eat the poor guy," Kirishima said to his left.
Katsuki glared at the redhead, or currently not-redhead whose hair was tucked away beneath a horrible black Frankenstein wig. Mina had made him wear it so they could match. She wasn't the Bride of Frankenstein though, she was Doctor Frankenstein. She convinced Kaminari to be the Bride with very, very little convincing needed.
"I'm not being vain, the tiny idiot just looks better than anyone else I've seen tonight."
"Anyone you've seen, or anyone you've seen dressed up as you?" Kirishima asked.
Katsuki shrugged, and took another swig of the horrendous "Witches Brew" Kaminari seemed to be trying to poison him with.
Kirishima snorted at his obvious avoidance tactics.
A long arm with a distinctly thick elbow draped around his shoulders, "Kinda hot honestly, can you imagine getting with someone dressed like you? Bet they're a big fan," Sero mused inserting himself half between and half on top of Katsuki and Shouto. The four were now way too obviously staring across the crowded street at the oblivious Dynamight.
"Ninety-nine percent of my fans are the most annoying fucking people I've ever met, I doubt it would be that good," Katsuki said with a scoff, trying to turn away before their gawking drew any attention.
"Yeah your fans, gotta be off to like you," Kirishima said, also turning away while patting Katsuki on the shoulder as an apology for being even slightly mean for a second.
Katsuki glared at him, then turned that look towards Sero who was still hanging off him, and still staring at Katsuki's clone.
"All I'm saying is our hotel's like a block away, and if anyone in this world was going to fuck themself it'd be you," Sero said.
Katsuki scoffed and shrugged Sero's arm off, annoyed when it pulled his cape to the side as it went and Katsuki had to reach back to adjust it.
Did Katsuki want to be in the middle of the local party street on Halloween wearing a costume and drinking with his dumb friends? No. All of that could have been done costume-free at one of their well-used and frequently visited homes. Yet here they were, ten years out of high school, nine years into Katsuki being number one in the hero ranks, standing outside a bar drinking with a bunch of random extras.
Extras that Katsuki wasn't going to let show him up when it came to costume skills.
Katsuki did not buy his outfit at some mass-produced shitty store. He hand-made his Bronze Age All Might costume, thank you very much. He didn't want to wear the same era outfit everyone else was wearing, All Might's last era?... No, thank you. Black looked better on him anyway.
He would rather die than let the now old but still kicking All Might see his pupil's outfit, so Mina had prematurely been banned from posting pictures of Katsuki online.
Katsuki was proud enough, he didn't need internet validation to know that his outfit was absolutely spot on. The black suit clung to his own well-defined body just right, the flowing cape made of soft material danced around him as he moved. Even his wig was two different wigs crafted and styled together for the perfect amount of volume and definition. If he was going to do a costume, he was going to do a damn good job of it. His fashion designer parents sure as hell didn’t raise a guy who bought a stupid expensive yet cheaply made costume online two days before Halloween.
Which is why he appreciated someone else putting in the effort as well, that's all.
Katsuki lost sight of the fake Dynamight after he turned away, until an hour later when he was dragged into yet another bar. This one was a few doors down from the last, and there was some insistence that it once again had some fancy, themed drink they all needed to get. This drink was glowing and served in a beaker, the Frankenstein trio was losing their minds.
They’d lost Sero and Shouto on the way over, leaving Katsuki alone as he dodged joining the photoshoot his friends were now having against a wall with a backdrop he was pretty sure was a tablecloth. He didn't bother saying anything as he left them and wandered away. The weird Halloween club mix the bar was playing at full blast meant he'd have to get dangerously close to them to be heard anyway.
Too close would mean pictures.
Katsuki tracked the cobwebs strung across the ceiling above him and which ones were dipping down a little low, too close to his hair spikes for comfort. His efforts in dodging them meant he didn’t notice he was walking towards someone until he ran directly into them. He knew who it was before he looked, because his own damn headpiece was stabbing him in the neck, and the shitty store-bought headpieces for his costume were never made of anything of high enough quality to withstand a light breeze.
Katsuki as expected found the mini version of himself when he looked down, and the man stared back up at him. The omega man. Even over the thick smell of the rest of the crowd, and the fog machine in the back of the room pumping the air full of a stinky mist, Katsuki could smell the sweet scent that usually only omegas carried. One Katsuki was usually immune to, but this time…
The omega Dynamight was frozen still, staring up at him with wide eyes. Katsuki wondered if in that instance he was busted, this big of a fan could potentially figure out who he was from this close. Even with the wig, the outfit, and the makeup that attempted to shape his face and eyes closer to All Might's.
Katsuki wondered if he cared… for the first time in his life maybe using his status could be worth charming the omega.
No, bad, stupid idea, what the fuck was he thinking?
Large eyes filled with red contacts narrowed at him, and Katsuki realized the man was talking to him, but Katsuki couldn’t hear him.
"What?" Katsuki yelled over the crowd and bent down to better hear. If he was caught out by this little fan he needed to know.
The Dynamight blushed, or at least Katsuki thought he did. His ears that stuck out under his spikey blonde wig turned red. His cheeks didn't though, Katsuki assumed because of the makeup that he could see on the man's face, his attempt to shape his look to appear more like Katsuki’s.
"Bronze Age All Might," The man finally said, loud enough to be the first thing that Katuski heard from him.
Katsuki couldn't help but smile a little, it was pretty clear he was All Might, and any basic fan could guess the era of the costume, but this guy looked impressed.
"You look really good," the guy yelled.
"I know," Katsuki said back, "You look a little small to be our shitty number one hero."
The guy's face turned to something that looked a lot more natural coming out of Katsuki's mask, "He's not shitty!" The guy said, definitely yelling that time. "You look a little small to be All Might!”
Fair, who wanted to be as tall as All Might anyway? And what did it matter, even in high ass platforms the man still had to twist his neck back to look up and see Katsuki’s face, any taller and they’d be struggling even more to talk to each other. Which Katsuki didn’t care about, he didn’t.
“I’m as big as he is in all the places it matters,” Katsuki yelled back, surprised enough at himself that the smirk on his face faltered a little. Fucking a fan was still not a good idea, no matter how perfect the guy smelled, and Katsuki never did shit like this, picking up omegas in bars? He’d been a perpetual bachelor for years for a reason.
The omega seemed conflicted, not sure whether to be annoyed or enticed by Katsuki’s comments. “Dynamight’s the Symbol of Victory,” he continued to defend him, admirable, ”you're just some guy dressed up like the Symbol of Peace wearing a shitty inflated top!"
What a spirited little fan, Katsuki thought, a grin spreading across his face as the guy got more animated as he spoke. He didn't seem to like that cocky smile though, so he decided to emphasize his last point. He had to come up from the side to work around his gauntlets, but he reached up and poked Katsuki directly in his right pec.
Both of them looked down at the finger. Katsuki was assuming that at this moment, even through the thick gloves of the Dynamight costume, the guy was realizing Katsuki was in fact not wearing one of those fake muscle shirts under his costume. All the muscles he had currently wrapped in All Might's way too tight suit? Those were all him.
The guy didn’t know that he was Dynamight himself, or he wouldn't have been so surprised. Katsuki gave himself that pass and assumed he was solid on continuing to mess with the pretty omega.
"All real, bigger than Dynamight's ever been."
A cute little nose scrunched under the black mask covering the man's face, insulted again, on Katsuki's behalf. Someone moving around them bumped little Dynamight forward, and the annoyed look on his face faltered as he caught himself with a hand on Katsuki’s chest. Katsuki also reached out to steady him, settling a hand on the guy’s hip.
"You’re half the man Dynamight is!" The guy said back, but he didn't seem as upset, more distracted, especially as he pressed his palm harder to Katsuki’s defined body. Katsuki was starting to think he might have found one of the one percent of his fans that were tolerable.
It was nice to see a guy go to bat for you in some random ass bar on Halloween, head to toe dressed in your costume, with your hair and even wearing some bright red colored contacts to mimic your eyes.
Katsuki was interested, and he was invested now.
He leaned down, closer to the omega’s ear so he didn’t have to yell so loud. He had to actively hesitate from pushing too close, catching himself before his nose could press against the exposed skin between the omega’s wig and the top of Katuski’s mask. He was lucky the omega’s throat was hidden away by the high collar, that would have been far too tempting.
“Maybe, but like I already said, I’m big enough everywhere it’s important,” Katsuki said, lips close to the omega’s ear. He was fairly sure this time, even under the makeup, the mask, and the dark lights of the bar that he could see red on the cheeks of his fan.
“I doubt it,” the guy said back but his words didn’t have much bite in them anymore, and again he tucked himself closer to Katsuki’s chest.
"Do you want me to prove it, Dynamight?"
Katsuki didn't pull away far after dropping that comment, moving just enough to look the man in the eyes, the tip of his nose gently brushing across the man's cheek as he moved.
The omega stared at him, his lips were parted just barely, and his eyes were glossier than they had been when they first started talking. His face twisted a little as he thought like he remembered he was supposed to be annoyed with Katsuki, but he just couldn't nail it. Little fan liked being toyed with, guess that was how he ended up a fan of Katsuki's.
"What are you offering? Because with an attitude like yours, I'm not sure if I'm signing up to be blown or murdered in an alley if I leave with you!"
Katsuki slid the hand on the man's hip around to the small of his back and pulled him closer. Their torsos pressed together, well, partly, Katsuki was sure his crotch was pressed up against Dynamight's stomach with the height difference the two of them were rocking.
"I won't blow you or murder you in an alley, I'm staying at a hotel around the corner, I'll blow you or murder you in my hotel room on the bed."
Dynamight didn't look fully convinced, Katsuki had to separate them a little so he could bend down again. Not kissing the man who hadn't moved to kiss him either, but instead grazing his lips across the omega’s round cheek just where his skin met the bottom of his mask. Katsuki stopped when he could press a kiss just below the spikey hair of the wig, his lips finding the soft skin below the man's ear. He was chasing that scent again he knew it, but hopefully, the omega was just as interested in Katsuki’s smell.
The room was still loud as hell, but Katsuki knew he heard a whimper in his ear. If this guy was making noises like that from just one little kiss? Katsuki was very much going to enjoy the rest of their night.
Katsuki kissed the omega again, and again, trailing across his jaw, annoyed at the high collar of the costume Katsuki had helped design that was covering a neck that was sure to be as sensitive as the rest of him.
"Okay," Dynamight said as Katsuki neared his lips, quiet in the loud room, but intentionally loud enough for Katsuki to hear, "Yeah, okay," and Katsuki wasn't sure which one of them moved first, or maybe they both moved at once to finally press their lips together.
Their kisses were gentle, they tilted their heads to fit together, soft plush lips meeting Katsuki’s own. But the omega’s lips parted just so slightly, enough to dampen Katsuki’s who chased the taste with his tongue first over his lips, then searched for more from the source.
The omega was happy to give Katsuki a taste, the two of them pressing together in the crowded room thinking about nothing but the feeling of each other’s lips, and the scent that had begun swirling around them.
It was the omega who pulled away first, staring up at Katsuki again like he had when they’d first bumped into each other. “Hotel?” he asked, and that was all Katsuki needed. He reached down around one of the gauntlets keeping the omega from getting too close to him, and grabbed a gloved hand.
“Hotel,” was all he said in return before he started to pull the two of them away.
They had almost left the bar when Katsuki felt his new companion slow down. Katsuki turned to check on him and saw him waving with one giant gauntlet, a phone barely visible in the hand being waved. Katsuki looked across the room and saw a short woman with round cheeks under a masquerade mask wearing a flowy gown watching them back. The woman had fake puncture wounds on her neck, probably to match the blonde next to her in a similar outfit who had blood flowing down her chin. Katsuki watched the woman look at the omega he was with, look at Katsuki, roll her eyes, and give a wave in return.
Katsuki on the other hand just nodded in Kirishima’s direction as he passed right by him. He didn’t look at his friend long enough to know if he’d been seen, but the exasperated, “Oh my god,” he heard distinctly in Kirishima’s voice was enough to know he’d been caught dragging a mini version of himself out of the bar to take back to their hotel.
Sero would have been proud. Katsuki wasn’t sure if that was something that reassured him.
The trek to the hotel was annoying, busy, and full of people. It was all Katsuki could do to keep their hands clasped together as they waded through dancing demons, flirting fairies, and wasted witches. Thankfully the hotel was close, although painfully crowded inside as well.
They got in the elevator with a couple of other people, Katsuki pressed to the back wall with Dynamight standing in front of him, leaning against his chest.
Katsuki wasn’t a fan of the smell of all the bodies trapped in there, or of the rowdy crowd that kept moving slightly too close to the omega. Katsuki wrapped an arm around the man, grabbing hold of his belt to keep a grip on him while pulling him closer back to Katsuki’s chest.
The omega’s breath hitched at the movement, and he pressed backward on his own despite already being held tight in Katsuki’s grip. Katsuki could feel the heat coming off his body everywhere they touched, could smell his scent this close even under all the others. Then quickly, there weren’t any others, and the two of them were left alone still traveling to Katsuki’s high-floor room.
Katsuki and the man didn’t bother to turn around and face each other, Dynamight simply turned his head over his shoulder and tilted his face up. Katsuki dodged the dangerous spikey headpiece so he could be there to meet those waiting lips again. They didn’t have long before the doors were pinging open, the omega didn’t seem to notice though because he didn’t pull away, so Katsuki simply used his grip to pick up the smaller man and carry him out of the elevator.
He instantly made a noise against Katsuki’s mouth, more annoyed than turned on.
Katsuki just laughed and pulled them apart so he could start down the hallway towards his room, the Dynamight wasn’t too annoyed because the hand Katsuki reached out behind him was grabbed onto.
Katsuki used it to pull them both along again, but this time a much shorter distance, quickly opening the door and rushing them both inside so he could turn around and face his smaller self now as he leaned down to kiss him again.
They kissed against the closed door of the room, the floor-length mirror in the hall, and the wall across from the bed. The fake gauntlets were lost along the way, and both of their belts were next to follow. Then Katsuki with practiced ease, once again impressed by the attention to detail, detached the silver brace around the neck of what was normally his costume. They finally landed, Katsuki sitting on the end of his bed as the other Dynamight climbed into his lap.
Katuski was getting annoyed with the Dynamight costume though. He could feel an incredible ass under his fingers when he squeezed, but the heavy black pants were getting in the way of any better access. The omega on the other hand was clearly delighted to find out that the All Might outfit was two pieces that had come together behind the belt but were now easy to separate so he could sneak his hands under the front of Katsuki’s shirt. He pulled away just to tug off and drop the thick Dynamight gloves, leaving his arms clad in tight fabric, but his hands free. Strong warm fingers then trailed up Katsuki’s torso until they wrapped around his pecs and squeezed. Katsuki wanted to touch too though, he didn’t plan to let his little fan have all the fun.
Katsuki quickly undid the front of the thick Dynamight trousers. Underneath he found a new gift, his fingertips trailed across the soft fabric of panties, following it around the swell of thick hips until he found the ass he was looking for. His hands weren’t wide enough to cup a cheek in each of them but he did the best he could before he squeezed, harder than his chest was being fondled.
The omega let out a sweet moan into Katsuki’s mouth that Katsuki chased the origin of with his tongue. Licking into the man’s mouth like it was the sweetest thing Katsuki had ever tasted, because maybe it was. But Katsuki hadn’t tasted the tantalizing slick he could now smell in the air so he believed things may only get better as he went.
He found it after he smelled it, the pads of his fingers meeting the damp fabric where the omega was waiting for him next. Katsuki pushed and the slick panties wrapped around his fingers as he pressed them up against the omega’s hole. The omega whined, short and sweet but desperate, Katsuki swallowed that sound as well.
He stood, picking a squirming Dynamight up as he went, his All Might cape still swishing behind him as he moved. He held the omega up with the grip he still had on that plump ass. His fingers still brushed up against his goal. Small but strong teeth latched around his throat as he moved, grazing just over the scent gland in his neck and making him groan and press his dick up against the hot body wrapped around him.
The omega moaned back at the feeling, hot mouth now sucking at the abused scent gland as Katsuki turned and started to settle them both down on the bed. Until there was a noise of protest and a hand on his chest that stopped him before he pushed the omega down onto the bedspread.
Katsuki pulled back, a little reluctantly as the owner of the hand pushing him was also still kissing him as he went. But they separated, and all the small Dynamight said was “I don’t want to ruin my wig,” Before he was turning around beneath Katsuki, dropping his face to the bed, and shoving his ass back up against Katsuki’s groin.
Katsuki’s brain slowly caught up to what was just done, looking down to see the body beneath him illuminated with only the lights of the city through the hotel window. The back of the tight black shirt was riding up, the heavy pants pulled down just enough to see the top of an ass clad in tight panties. Panties that had what looked like a fucking orange x peeking out from where they were visible.
Katsuki grabbed the top of the pants and pulled because he knew what it was but he needed to see it as soon as possible. The X that appeared was the one from his outfit, the two circles around the top right now visible along with the rest of the X that stretched across an ample ass. Right in the middle of the lighter orange color, Katsuki could see the fabric darkened, damp with the slick the omega was leaking for him.
Katsuki almost didn’t want to take them off, he wanted to rip them open and fit himself right where he was meant to be. This omega was fucking made for him. But the desire to pull the panties back up over that ass once it was dripping with Katsuki’s cum was far greater than any desire to ruin them.
Katsuki pulled away and dragged the omega back by the top of his thighs as he went. The omega ended up losing his position as his knees slid off the edge of the bed and he suddenly dropped down onto his stomach. The omega’s feet lowered and with his ass hanging over the edge of the raised bed he could barely find the ground with the toes of his tall boots.
Katsuki kneeled next to the bed, closing the legs in front of him to press together, the boots now squeezed between Katsuki’s thighs, one thick heel at the perfect height to rub against Katsuki’s cock as Katsuki leaned in closer.
Katsuki pulled those perfect panties down around the swell of the omega’s ass and was greeted with an even more beautiful sight. The skin in front of him was dotted liberally with freckles that the omega must have covered on his exposed face, and Katsuki could see the skin between the full freckled cheeks glistening.
He cupped the ass in front of him again and started to press hot kisses and measured bites across the skin, following a trail of freckles that seemed to lead him exactly where he wanted to go. His first lick across damp skin was enough, like switching a flip and dropping food into a starving animal’s cage. His hands squeezed the flesh trapped in them so he could spread the omega’s ass, and he buried his face between the omega’s cheeks.
His tongue slid easily across already wet skin until he found the source. He slipped it inside with no resistance at all, plunging in with the intent to drink the slick he’d found there. The omega had been gasping and panting against the bed at first but now was letting out noises that could only be explained as squealing as he wiggled in Katsuki’s grip.
The omega’s slick tasted better than Katsuki had imagined it would. Katsuki felt like he’d wished upon a star and been granted a seemingly never-ending fountain of the most amazing thing he’d ever tasted.
The omega cried out louder and louder the deeper Katsuki’s tongue reached, and lucky for them both he had a very agile tongue. The omega squirmed and whined as he was fucked with part of Katsuki that was much smaller than what he was going to be taking next. Katsuki just kindly wanted to make sure he was ready for the rest of him. Kindness, of course, was his only reason for sliding his hands up, and one at a time pushing both of his thumbs into the gushing hole, just beneath his tongue.
The omega cried out as Katsuki spread him open to get impossibly closer as he ate out the slick hole in front of him. Feet danced between Katsuki’s legs as they tried to find their footing while he squirmed against the bed, grinding his dick down and trying to shove his ass back against Kastuki’s face.
Katsuki’s thumbs were now also slowly fucking in and out of the omega, and that was enough for the omega to clench as tightly around the three invasive parts of Kastuki inside of him as he screamed and came. His legs straightened out as long as they could, tense against Katsuki’s body. But most beautifully of all, his hole gushed with slick. Katsuki swallowed what he could, but he had the poor thing spread open so much that slick still poured out of him, dripping down Katsuki’s wrists and neck to dirty the All Might suit he still had on.
It was washable, and even if it wasn’t, Katsuki would give the world for this moment. He didn’t know if the omega was only looking for a one-night stand, but Kastuki was determined to make this so good for him that if he had entered Katsuki’s room with that intent, he’d change his mind by the time Katsuki was done tonight. Katsuki was not letting him go, all old mantras of being too busy to need a mate were being exploded away with every sweet noise the omega made against the bed. The first bits of his resolve had crumbled earlier along with the sound of the omega’s voice over the noise of the bar.
Katsuki slipped his thumbs out as the other man relaxed against the bed in a panting heap. But Katsuki wasn’t done making sure his partner was ready for him. He pulled his mouth away too after one more deep kiss to one of his new favorite things in the world. He heard the omega sigh, so sweet, so calm until Katsuki dipped the tip of three fingers into that waiting hole.
The omega’s breath loudly caught in his throat as Katsuki began working his fingers in. They pressed forward a tiny bit more with each thrust, slowly coating themselves in the slick still pumping out of the omega.
He took them so well, even with all of the sweet little noises he made as Kastuki worked them in. Then the poor thing began to beg as Katsuki started to curl them inside of him. He was testing the omega, making those fingers take up even more space by spreading them apart while pressing against all the same pleasurable spots in the omega that he would if he knotted him.
He couldn’t remember the last time he’d popped a knot during an orgasm, he did remember the last time he had a knot with a partner because it had only happened once before. He didn’t exactly get attached to the few people he only ever briefly dated. This random omega he’d met an hour ago though, the omega whose name he didn’t even know, this one he wanted to keep around.
Because here, now, he could already feel the pressure of the threat of a knot at the base of his dick that was still untouched in his pants. It wasn’t just him who wanted to keep this omega around for longer than tonight, his body was begging for it.
“If I fuck you, I’m going to knot you,” Katsuki warned, his voice low and as thick as the slick he’d just been guzzling.
“Please yes, oh fuck, please knot me, fuck me, please!” The begging words whispered earlier as the omega had come, were back loud enough to hear at the threat (promise) of a knot.
Katsuki kept one hand busy fingering the omega’s ass as the other worked over the omega’s clothes. He unlaced the heavy boots before tugging them off, undoing the equally heavy kneepads, and tossing them aside as well. Then all Katuki needed to do was grab the crotch of the pants and pull them down and off, chucking them out of his way.
The Dynamight panties fell and tangled around the omega’s ankles which were clad in high-calf black socks also sporting orange x’s, they were all that was left covering his lower half. Katsuki could now see freckles dotting every inch of visible skin. They danced in the night light as the omega’s body jiggled with the force of Katsuki pressing his fingers in as deep as he could just to see how much the omega could take.
With the boots gone the omega wasn’t close to reaching the floor anymore so his feet kicked in the air as he squealed and writhed, jerking his hips down against the bed then back onto Katsuki’s fingers.
“Please,” the omega begged again, his voice thick with his desperation. Thankfully, Katsuki was feeling desperate too.
He stood, slipping his fingers out of the omega as he went. He pulled down the tight bottoms of his All Might costume, then the weird underwear he’d bought to keep his dick from too obviously showing through the outfit.
He noticed the omega was moving on the bed in front of him, and when he looked up, the man had turned around to lay on his back and face Katsuki. He was watching him, so Katsuki made sure to show off, wrapping still slick wet fingers around himself and fisting his cock. The slick smeared down the shaft as he stroked his thick cock making it shine.
Katsuki watched the omega in return. Finally getting to see the omega’s dick, substantially smaller than Katsuki’s own, but hard and shiny against the omega’s stomach, still covered in his cum from the orgasm Katsuki had licked out of his ass earlier. All he wearing now were his Dynamight socks, his Dynamight panties that were hanging off one ankle, bicep-length tight gloves, the tight Dynamight shirt, and his blond spikey wig and explosion headpiece.
“You better take that off, I’m not going to give a shit about ruining your wig when I’m fucking you,” Katsuki warned.
The omega seemed to take a moment to process what he said, and then without a single care left for the wig, he pulled it off his head and dropped it and the large mask to the side of the bed. He pulled a wig cap off as well when he was done, releasing a poof of messy hair that had been trapped underneath it. The hair was as dark in the night as the black makeup that had been protected by the mask, the rest of the makeup on his face was half-smeared off from being shoved against the bed minutes ago. Contour was missing from one cheek and half of his jaw, letting the realistic roundness of his face show through.
“I can restyle it,” he said, voice breathy as his eyes never stopped roaming Katsuki’s body.
They focused on his dick, the sliver of abs visible under his rucked-up shirt, the All Might outfit still stretched tight across his chest, and the cape hanging off his wide shoulders. His gaze trailed up over Katsuki’s face and then higher to the wig Katsuki still wore and Katsuki wasn’t sure whether he should be offended or not as it clicked into place.
“You little fucking nerd, you’re getting off on this,” Katsuki said, his lips twisting up into a sneer.
The light in the room wasn’t bright enough to know for sure, but based on the look on the omega’s face as his eyes darted away, Katsuki knew he was blushing.
“I thought you were Dynamight’s littlest fan, but you’re just as into All Might aren’t you?” Katsuki didn’t ask which hero he liked more, he didn’t want to know. Besides it wasn’t All Might here fucking the nerd, it was him, he’d make sure the omega knew it next time.
Katsuki grabbed his thighs and dragged him back to the edge of the bed. He yelped and looked up at Katuki again, good. There was something about it, heated yet bashful, staring up at him through big eyes, that look made Katsuki impossibly harder.
“I can fuck you better than All Might could,” Katsuki said. Watching the man slowly look down between the two of them as Katsuki’s dick pressed down against his body. It slid between his thigh and his dick, their two cocks were as incomparable as Katsuki had assumed. The omega’s breathing was starting to get ragged as he watched the two of them slide together.
“I can fuck you better than All Might, and I’m willing to bet you take cock better than Dynamight ever could,” Katsuki said and was immediately rewarded with wide eyes back on his.
Katsuki used the moment of distraction to settle the head of his dick against the omega’s slick, waiting hole. Long, pretty eyelashes fluttered as Katsuki did, and as Katsuki pushed just the head in he could swear he saw the omega’s eyes roll up beneath those lashes.
The omega trembled in anticipation beneath him, but when Katsuki didn’t move lidded eyes looked up at him from where the omega lounged back against the bed. The omega’s legs wrapped high around Katsuki’s hips, crossing behind his ass, beneath his cloak to pull him in closer.
“I can take your cock better than anyone could,” the omega said confidently, and Katsuki shuddered at the words. The pretty man under him reached down between the two of them, the tips of his fingers barely brushed over Katsuki’s cock before they trailed up the omega’s own body. They slid past his dick, over his stomach, and hooked the tight shirt as he went until it was pulled off entirely, and his pretty dark nipples were now visible to Katsuki on his soft chest.
Katsuki found himself leaning toward them without thinking about it until both of them were groaning at the sensation of Katsuki sinking his dick deeper into the wet hole sucking him in.
He was close enough that the omega reached up and wrapped his arms around Katsuki’s neck, pulling him down until Katsuki was dropping onto his elbows on the bed, and using that final momentum to sink completely into the omega beneath him.
The omega let out a whine as it happened, and Katsuki leaned down to kiss him again now that he could. He caught sweet lips in his as he started to shift his hips, pressing up closer and then pulling back just a little to work them both up to it.
Katsuki didn’t want to pop a knot immediately, but the slick tight heat squeezing his cock, and the beautiful omega crying out for him attached to that hole was a lot already. He wanted to fuck the omega well before that happened, he wanted to hear the sweet thing beg again and wanted to feel the clench of the omega coming around his cock.
Katsuki sped up his hips only to hear more and more moans and little whimpers coming from the omega with each thrust. They weren’t kissing anymore, their lips just brushing against each other as Katsuki fucked him harder and harder, and the omega’s legs tightened around his ass pulling him in as both their hips shifted to meet each other.
Katsuki had to drag the omega back down to the edge of the bed because his thrusts had been bouncing him away. To keep him in place Katsuki threaded his fingers through the mess of hair on top of the omega’s head, grabbing enough of it not to hurt, but to keep him exactly where Katsuki wanted him, holding him down to take it as Katsuki fucked him.
The omega moaned at the feeling, and his head rolled back almost to tug his hair with Katsuki’s fist. It separated their lips but exposed the perfect arch of a neck to Katsuki. Katsuki could taste makeup on it as he pressed his lips to the skin there, likely to hide the freckles Katsuki had found everywhere else. His lips made it low enough to find the curve of the omega’s neck. There was nothing here now blocking Katsuki as he licked and nipped at the scent gland he found.
The omega cried out beneath him, and the arm around Katsuki’s neck tightened to keep Katsuki right there where he was wanted. Katsuki was fine with that, happy to bite and suck marks all over the scent gland that released the most euphoric thing he had ever smelled. It smelled like evergreens and rain, it smelled like a home he’d been longing for his entire life but had forgotten existed.
Katsuki wanted to spend the rest of his life in this exact moment.
He had sped up the pumping of his hips without realizing it. That plus his mouth working away, and the omega’s dick trapped between their bodies, had the omega coming again. Yelling in Katsuki’s ear, squeezing around Katsuki’s dick. Both of the omega’s arms wrapped around him now pulling them tight together as the omega stiffened and rode through his orgasm.
One of his hands had smacked Katsuki’s tall wig while trying to wrap an arm around his shoulders. It knocked it off, Katsuki should have noticed it was precariously loose but he had been a little distracted. The wig was ripped away, it tugged out bobby pins and yanked off his wig cap as it went. Katsuki didn’t care, not with the vice grip around his dick that he was pretty sure he’d marry anyway, who gave a fuck anymore if the omega figured out he was Dynamight.
Katsuki pounded the omega’s body through his orgasm as long as it was and he was happy to do so. The strong arms around his neck pulled him back into another kiss as the omega relaxed again. Both of them seemed equally invested in kissing the other using their tongues to get even closer to one another.
Katsuki only reluctantly began to pull away once he felt the knot that had been threatening him their entire time together, now showing some actual intent. He pulled back as he untangled the legs behind his ass. He grabbed muscular thighs from his hips and pushed them forward, bending the beautiful omega in half to keep fucking him with his feet in the air.
He was close but he was still going to give that omega the best lay of his life until he was ready to knot him. He must have hit something special inside the omega that pulled out another breathy gasp from him as Katsuki sat up.
Katsuki could see all of the omega again now, disheveled from his second orgasm and Katsuki’s ministrations. The omega’s lips were slick and swollen from battling Katsuki’s own. His hair was even messier now than it had been when he’d first freed it, Katsuki’s fist buried in what Katsuki could now see were curls had made a mess of it all. It fell all around the omega’s head, a dark ring against the white of the sheets. Like the dark rings of makeup around his bright big eyes.
He was staring up at Katsuki with a level of awe and adoration Katsuki was used to seeing ever since he’d become a known hero in high school. But his gaze was filled with something more, a level of reverence that no fan had ever shown. No fan of Dynamight, but one fan of Katsuki’s had always looked at him with that much praise and love in his eyes.
Katsuki fucked the omega as that look seeped into his bones. It felt so natural coming from such a large, wide gaze. Normal to come from beneath him regardless of what Katsuki was doing. Then Katsuki could see them, the dark freckles that matched the rest of the omega’s skin were showing on one of his cheeks, under the makeup that had rubbed off against the bed. The pattern was distinct, one Katsuki had memorized twenty-five years ago.
Katsuki’s hips stuttered as the realization sank into him.
“Deku,” Katsuki said, it was quiet but the rasp of the word rang loud in the dark night.
Eyes that were no longer just bright but now brimming with tears gazed back up at him, wide above round cheeks, and a bright smile. Katsuki could see the Dynamight shirt bunched up next to him on the bed, his Dynamight socks high in the air next to Katsuki’s head.
Izuku Midoriya lay beneath Katsuki Bakugou in that bed, Katsuki was certain of that.
The omega that had haunted Katsuki since the day he’d presented. The boy who’d infatuated and infuriated Katsuki since the day they’d met. The hero he’d lost trying to convince Deku he wasn’t one. Despite it all Deku wore his merch, created an outfit of his to wear for Halloween, and still looked up at him with the same look he’d had in his eyes the day they’d met, and the last day they had ever seen each other almost 15 years ago.
“Izuku,” Katsuki said, his hips slow now, settled with his cock still buried in Izuku’s body.
Deku reached up and cupped Katsuki’s cheeks in his shaking palms. Tears rolled down the side of his face now, but there was a laugh hidden in his voice as he smiled and said, “Kacchan.”
It was the most beautiful thing Katsuki had ever heard.
The knot at the base of his dick that had been threatening to swell popped instantaneously.
Katsuki groaned as his body rapidly locked itself inside Izuku’s, Izuku moaned, throwing his head back again. His hands squeezed Katsuki’s face and Katsuki turned to nuzzle into his palm as he started to come.
He could feel his body pumping out his seed, again and again, filling Izuku up around his dick. Making his slick hot body even messier as he locked inside of him and the best sex he’d ever had climaxed with his body desperate to get the omega beneath him pregnant. To keep him around forever right next to Katsuki’s side where he was always meant to be.
It had never felt like this before, not with anyone else, not alone. But everything made so much more sense knowing he wasn’t with some random omega he’d happened to click with. His body knew Izuku’s, he was just a few steps behind his instincts.
Katsuki barely had it in himself to swing Izuku’s legs to the side before he dropped down on top of him. He gathered Izuku to his chest, molded himself against the omega’s back, and tucked his face back down against a now understandably perfect scent gland.
Izuku turned to press a kiss to his hairline as he did so.
“Kacchan,” Izuku said his voice a little coy.
“Hmm,” Katsuki replied, all he had in him as he tried to stop himself from starting to rock into Izuku again while they were locked together.
“Do you often have sex with people dressed up as you,” Izuku asked.
Katsuki huffed against the gland he had started sucking on, he was trying not to… but it was right there and Izuku hadn’t stopped him.
“A little much, even for you is all I’m saying,” Izuku continued.
Katsuki dragged himself off Izuku’s neck to glare at him, “Do you usually fuck guys in All Might outfits?”
Izuku gave him a little shrug, or as much of one as he could all wrapped up in Katsuki’s arms.
“You were the one dressed up like me, don’t you think that’s a little much,” Katsuki said in return as he cocked an eyebrow at the omega underneath him, still wearing dark red contact lenses to match Katsuki’s own eyes.
“What if I just wanted to dress up as the number one hero for attention?” Deku said, with an air of indifference in his voice that wasn’t reflected in the costume that he’d clearly hand-crafted over dozens, maybe hundreds of hours.
Katsuki smirked at him and with that look alone Izuku squirmed in his arms and blushed again.
Katsuki leaned down so their noses were brushing, “Were the little Dynamight panties I pulled off you for attention too?”
Izuku flushed, any part of him not covered in makeup and not already red blossomed under Katsuki’s gaze.
“I should have assumed the best-looking Dynamight I saw all night had to have some… hidden details to his outfit,” Katsuki said, and he kissed the cheek closest to his lips, trying to get Izuku’s attention back on him. That wasn’t what had worked, but he was successful either way.
Izuku turned back to him with a little smile tugging his lips, “Was I really the best?”
“Mhmm,” Katsuki agreed and kissed Izuku’s lips now that they were closer. “Those other idiots out there had the saddest-looking fits I’ve ever seen, you cared,” Katsuki said.
‘Cared about me’ they both knew, Izuku even after all of these years still able to read between the lines of what he said and what he meant, even if Katsuki was getting closer to the two being the same these days.
Izuku shifted in Katsuki’s arms to lay a little more on his back so he could look up at Katsuki better, the action made the alpha grunt as it tugged at his knot with Deku’s slick tight body. “You’re not upset it’s me?” Izuku asked, his eyes searching Katsuki’s.
Katsuki snorted at the question, he knew it was asked in earnest but the answer was still the same, “All of this happened because it was you, this was only as good as it was because it was you, whether I knew it or not. You only feel, smell, and look this good because you’re you, some other fucking schmuck wouldn’t have had a night with me anything like what we just had.”
“If you’re sure…”Izuku started, but Katsuki interrupted him with a kiss, leaning down to steal whatever words he planned to say next out of his mouth.
Their kisses were still the best he’d ever had… but now? Katsuki had been worried before that he’d never leave the omega alone after this, no, he knew that for a fact.
“Mmm Kacchan,” Izuku whispered against Katsuki’s lips between kisses.
It had been so long since Katsuki had heard that, again he felt it with almost his entire body. The old nickname rolled through him like a wave crashing against the shore. His hips were rocking forward again because it was Deku he was inside of, his body was never going to let this knot go down.
“Kacchan,” Izuku said again, almost moaning the name as he clenched around Katsuki’s dick.
Katsuki jolted forward, no longer casually rocking against Izuku’s ass and instead grinding down against the tight heat around him. He was still trying to focus, still trying to see Izuku, like he couldn’t take his eyes away from him now that he knew who he was. But that name on Izuku’s lips after all of these years was a spark setting him ablaze.
Izuku was watching Katsuki right back. His hips rocked down to meet Katsuki’s controlled thrusts but his eyes couldn’t pull away from Katsuki’s face. He could see Katsuki watching him back, so he knew when he tilted his head back and barred his neck to Katsuki again, that Katsuki had definitely seen the offer.
Katsuki huffed, just one bite wouldn’t be permanent, but it certainly wasn’t an offer given to a one-night stand. Izuku wanted Katsuki around after this night, wanted him close enough that he was offering the chance for their first mating bite to happen now. Katsuki would court the shit out of him after this, he’d earn his second bite, but he sure as fuck wouldn’t turn down the offer tonight.
Not with Izuku squeezing his knot, not while a second orgasm threatened him with every shaky move. Not when he’d been willing to spend the rest of his life with this omega before he knew it was someone who’d shaped the man he was today.
He pressed his lips to the offered scent gland, he couldn’t tell if he was shaking or if Izuku was. It was difficult to know either way with how much they were moving.
Katsuki wrapped his teeth around Izuku’s neck and squeezed with the barest of pressure.
“Kacchan,” Izuku sobbed out, and Katsuki bit down.
His teeth sealed tightly around the offered scent gland, marking the omega beneath him even harder than intended as he began to come again. Every muscle in his body tightened as the second orgasm from the same knot ripped through him.
Izuku screamed, either at the feeling of the teeth in his neck, or his orgasm ripping through his body once again as he squeezed tight around Katsuki’s dick.
It took both of them much longer to finish riding out these orgasms, it was a while before either of them came back to themselves. Izuku had to catch his breath, Katsuki had to eventually dislodge his teeth and ended up gently sucking on the scent gland again, feeling imprints beneath his lips as he did so.
Fingers began threading themselves through Katsuki’s messy spikes, and he could feel sleep tugging at his eyes while he was still firmly locked inside his omega. He turned his head just enough to free his mouth, so he could speak before he passed out.
“Izuku,” Katsuki started.
Izuku nuzzled against the top of Katsuki’s head, “Hmm?”
“I’m glad it was you, Izuku,” Katsuki said. The words loaded with so much more, a gratefulness for Izuku now and back then, a desire for him long buried but never forgotten.
The two of them together now felt like someone had found the final piece to his puzzle that had been lost many years ago. So long ago he didn’t know he wasn’t complete until it had slotted into place.
“I’m glad it was you too, Kacchan,” Izuku whispered back sounding content, and genuine.
Katsuki smiled against Izuku’s neck and let his eyes drift closed, knowing Izuku would be right here when he woke up again.
~~
A conversation had a thousand more times across the rest of their lives:
“You’re never going to drop it are you?”
“Of all the people out that night that you could have had sex with, and you picked the guy dressed up as you.”
“I hate you.”
“But you love yourself, don’t you Kacchan?”
“You were the loser dressed up as me that picked All Might to fuck him, you have no room to talk.
“...”
“Thank fuck we have a different thing to tell people about how we met when they ask.”