Chapter Text
Izuku stood in front of the door to the head Alpha's penthouse. He was nervous. He had met Denki three months ago, and then the male Omega had been aghast with information the other Omega had shared a month later. An Omega without a pack was absurd. Denki had questioned him about how he handled his heats and the exhaustion that came after, along with everything else that happened in life, and the only thing Izuku could say was he handled it all alone.
Denki, the golden-haired Omega, was far from satisfied with that answer and had planned a meeting with his pack, pulling his Alpha, Shinso, into the plan the following week. Izuku couldn't even raise his head as his walked into this apartment weeks ago. All the scents smelled too excited, too happy, and he knew he'd ruin it. He was nothing special, just a pain, jade-colored and curly haired thing, with freckles. His green eyes held nothing to Denki's gold and he was short, so short.
He had stood there, staring at the hardwood floor, shaking, before a finger lifted his chin. He closed his eyes, tears leaking out from underneath his eyelids, as he awaited his judgement. Another hand pushed his curls from his forehead and he flinched when a nose pressed against the leather collar he wore around his neck. There was a huff as the face pulled away and then the Alpha scent closest to him grew vexed.
"Pikachu! Why the hell is he so scared!? What the fuck did you tell him!?"
Izuku heard Denki sigh dramatically, "I told you, he has never been a part of a pack, okay, Blasty? He is worried about being rejected."
"Rejected? If I didn't reject your dumb ass after you bought that purple-haired annoyance in here, why would I reject him?"
"Well, I don't know, you smell like gunpowder and a bonfire, he probably thinks you're gonna explode."
"Fuck you, ya dumb fuse plug!"
Izuku was trembling even more now and he whispered, "I can, I can leave. I understand if your pack is too big already or if you can't have the burden of another unmated Omega. I'm sorry to bother you."
"Hey, stop that shit. Open your eyes, come on. No one here is gonna hurt you or anything."
The green-haired Omega did as he was told and was met with ash blonde hair, scarlet eyes, chiseled features, and a sharp smirk. The Prime Alpha, because he had to be one with those long canines, tilted his head as he narrowed his eyes. He turned back to Denki and growled.
"You didn't tell me he was this fucking cute. Like I would fucking reject him." The Alpha then turned back to Izuku, "I'm Katsuki, head Alpha of this pack, and you're definitely welcome to stay. Kiri, or Shitty Hair, is second in command, for lack of better words, and he is the guy with red, fucking, shitty hair."
Izuku giggled then, because the red-headed Alpha looked like he was surprised by such an introduction even as the rest of the pack was cracking up. The Alpha then stood up from the nesting couch and walked up to the blonde Prime, pushing him away as the man smiled sharply at him.
"You're such as ass!" Turning to Izuku he held out his hand for the new Omega to shake, "My full name is Eijiro Kirishima, dude, and Bakubro will always be an ass. Don't take it to heart."
The rest of the meeting and first night with the pack had been nice. Izuku had been accepted into the fold so easily, climbing into the pack nest and accidently dozing off an hour in. It had been the best sleep of his life. When a female Beta, named Momo, gently woke him up, he had been embarrassed but she just chuckled and told him it was fine. Denki had dozed off too.
Now, he stood in front of the head Alpha's door in preheat. He didn't want to face another heat alone and he knew it was a little early to be asking this of the pack but he was desperate. Then he heard a door open to the only other penthouse on this level and a creepy looking Alpha was staring at him with a hungry sneer. Without another thought, and a fearful whimper, he pushed on the doorbell.
He heard a yelled curse, grumbling, and then the door was thrown open. There stood Katsuki, shirtless in sweatpants, and running a hand down his face. When he took in who stood in front of him, he raised and eyebrow before Izuku's scent hit him. At that same moment a deep growl came from down the hall and had the worried Omega looking at the other Alpha exiting his own penthouse.
Katsuki was then leaning out his doorway and snarled at the other Alpha before the man's other foot fell onto the tiles of the hall, "Don't you fucking dare think you have a right to him, asshole! He's my pack, MINE! Get back in there to your whores, bastard!"
Turning back to the submitting Omega, from all the Alpha pheromones filling the space, the blonde Prime murmured, "Come on, short stack, get in here. I'll call Shitty Hair to help take care of you until the rest of the pack can get here."
Izuku shyly nodded before entering the space. It was so big without the rest of the pack but the nesting couch still looked as inviting as ever with all its plush blankets, fluffy pillows and even hoodies and shirts left by pack members. He moved the duffle bag he brought on his shoulder to his front as he approached it and unzipped the biggest pocket. He pulled out a few precious items from his personal nest and found places to carefully tuck them.
“You fucking hungry or did you eat something before you came?”
Shaking his head, the Omega answered, “No, I haven’t eaten. I was too worried my scent would be too strong if I waited to come over. Being in preheat on a bus is never a good thing.”
Suddenly Izuku was spun around and the Prime’s heavy hands were on his shoulders, “You used the fucking bus line to get here when you smelled like that?! Are you damn insane?!”
Curling into himself, the bottom half of his face hidden by the exaggerated collar of his light green hoodie, the jade-haired man mumbled, “I didn’t know how else to get here. I don’t have a car.”
“CALL! I would have fucking come to pick you up! Why do you think we gave you all our numbers the first night you came here?!”
“I just, I didn’t want to be a bother.”
“How is one of the pack Omegas going into heat a bother!? HELL! When an Alpha goes into fucking rut no one talks about it being a damn bother!” the Alpha growled as he took a step back and rubbed his forehead.
“But, but that’s different. An Alpha is an Alpha,” Izuku tried to argue. “You don’t get all helpless and needy.”
A booming laugh left the Prime as he started heading to the back of the penthouse, “Oh no, we don’t get helpless and needy, just even more fucking short-tempered and demanding. Trust me, we are no fun on rut. I am going to get you a few more nesting items. You get comfortable and when I get back out here, I’ll make you damn food.”
Izuku nodded and climbed into the middle of the pack nest, burrowing into the scents of its members and sighed. This was nice. He had never felt this comfortable before during preheat, hidden in his little apartment alone, worried some crazed male Beta or Alpha would scent him and break into his living space. He hummed and rubbed himself against the fabrics, freshly scenting them.
“You’re so fucking cute.” The deep voice caused the Omega to jump before he took in Katsuki, “Sorry, didn’t mean to fucking scare you. Here, these are new but I thought we needed a few more damn blankets with another member.”
Soft, warm fabrics were set down on the edge of the nest and then the Alpha pulled a cell phone out of his sweats’ pocket. Izuku watched as he tapped on the screen a few times before setting it on the bar counter as he entered the kitchen. The Omega could hear the ringing of the call, the phone obviously being on speaker, while he slowly reached for the newest offering for the nest.
“Bakubro! You don’t usually call this early. What’s up, man?” came out from the cell as soon as the call connected.
“Shitty Hair, need you over at the penthouse. You have the damn day off, right?” was Katsuki’s immediate reply as he started cracking eggs. “Freckles showed up in fucking preheat after riding damn busses to get here and the bastard on my floor tried to start shit.”
“Oh fuck! Sure thing! Need me to bring anything?” Izuku heard Kiri respond.
“Shitty snacks or whatever, if you have some, and do you mind contacting the rest of the pack? Let them know what the fuck is going on. If his scent is this strong already, he’s gonna need the pack to feel safe through this shit,” the blonde replied as he beat the eggs before starting to chop some veggies.
“Yeah dude, no problem. Good thing I am still unmated, huh? You’d be having to knot him every time all my yourself,” Kiri teased.
Izuku shivered at the sharp smile covering Katsuki’s face as he stared right at him, “You say that like it’s a bad thing. If you don’t want to knot this cute, little, fucking thing, you can stay the fuck home.”
A harsh snarl come through the line that Izuku whining, “Fuck you. I am not going to be the only Alpha not getting his knot wet. In fact, I am calling off the next few days, you ass.”
The Omega felt fear curl up his spine as the call disconnected. Maybe this was not a good idea. Katsuki suddenly froze in his chopping and looked at him worriedly. He put the knife down, wiped his hands on a dish towel, and slowly approached the nest.
“Hey, what’s wrong? Shitty hair and I didn’t mean anything by that shit. Just stupid Alpha posturing, yeah,” he cooed as he reached out and Izuku tried to scoot away. “Oh, come on, I promise. No one in the pack will do anything to you that you don’t want.”
The Omega shook his head, “Other packs didn’t want me because I offered nothing. You just wanted me to have an unmated Omega.”
“That’s not fucking true. Why would you get that shitty idea? And how the fuck do you offer nothing!?” The Alpha demanded, settling on the edge of the nest.
“My first heat an Alpha found me, took me, and fucked me through it,” Izuku trembled as he answered, it’s not like he could leave in his growing heat state. “When I didn’t end up pupped, he said I was useless and let the rest of his pack know. Every other pack in the area found out so, I moved away. Still, any new pack I met wanted to know my history, and when I told them, they immediately rejected me. You, you didn’t ask, so I didn’t tell you. You obviously just needed any Omega to fulfill some other need, like what Kiri said, to get your knots wet.”
Suddenly the Alpha was up pacing, growling and snarling random curses before he turned back to the one in the nest, pointing as his nostrils flared, “No, no, no, fucking NO! If I ever meet that Alpha, I’ll string him up in the nearest park. That’s a fucking promise. And you were not brought into the pack for such stupid reasons, fucking shit. Shitty Hair and I will make you feel like a fucking queen or whatever and when this is all over, you’ll see you mean so much to our fucking pack. That is also a fucking promise.”
The Alpha then stiffly returned to the kitchen, forcefully chopping the rest of the vegetables, and muttering curses under his breath. Izuku breathed through his fear, the blonde quickly realizing his mistake, calming himself down and releasing peaceful pheromones into the space. Izuku’s heartrate slowed in response and his eyelids drooped. The sound of keys unlocking the door and it opening didn’t stir the Omega, neither did Eijiro softly speaking with the Katsuki.
Once the smell of warm food was right under his nose, Izuku snatched it like it was going to run away only for Katsuki to snicker, “Holy shit! You get fucking feisty in heat or what?”
The green-eyed male bared his teeth before shoveling food into his mouth which had Kiri laughing too, “He doesn’t mess around when it comes to food, huh?”
While he was happily eating, both Alphas entered the nest cautiously and began running their hands through his hair, kissing his forehead, and spreading their scent along his skin. If they wanted to be accepted during this heat, the Omega needed to be comfortable enough with them to trust them to take care of him. It was also why a pack nest was essential, the thing wasn’t for the Betas or Alphas but the Omegas. They needed that comfort, that assurance, too often used and abused. It gave them a safe place.
When Katsuki cautiously and slowly removed the empty plate and silverware from Izuku’s grip to take back to the kitchen, the Omega started twisting his head and moving his limbs in reaction to the next symptom of an incoming heat. Skin oversensitivity, something Denki had complained was torture. Eijiro reached out to slip the oversized hoodie over a head of jade curls, and Izuku allowed it, but still bared his teeth when the Alpha moved to assist him out of his pants. The redhead held his hands up in surrender and the Omega huffed out in admonishment before working the fabric off his legs himself.
“Holy shit, dude, he’s touchy,” Eijiro whined. “I just wanted to help.”
Katsuki was walking back to the nest as he answered in a low murmur, “Thank the fucking Alpha that took him his first heat. Probably made Izuku’s Omega damn suspicious.”
Red eyes, only a touch darker than the Prime’s, snapped to him, “What are you talking about?”
The blonde watched their newest pack member discard his pants before kneading a pillow to lay his head on and whispered, “I don’t want to fucking talk about it. Just know the fucking bastard better hope he never meets me and that Short Stack has faced every heat since alone.”
Eijiro’s head turned to watch as Izuku got comfortable, wearing plain, dark green, cheeky panties over that perfect ass and pulling the softest blanket he could find over himself. Whimpering at the thought of this gentle being going through something like a heat alone, when Omegas are the most vulnerable, caused the Alpha’s heart to ache. Then Katsuki was tearing off his own pants to gently lay down close to Izuku, and unhurriedly scooch closer bit by bit until he was permitted to wrap his arms around the human bundle. Following his lead, the redhead did the same.
Having dozed off, Katsuki woke to a gentle purr as shaking fingers stroked his jaw. He opened his eyelids to weary, emerald eyes before a wobbly, small smile spread across Izuku’s flushed face. After looking over his shoulder quickly at the still sleeping Eijiro, the Omega almost shamefully looked down at the blankets of the nest before reaching for the blonde’s hand. His small, scarred fingers wrapped around his larger palm before guiding it under the fabric covering him and into his underwear.
“Please,” he quietly whimpered, “I can’t stand it anymore.”
Katsuki’s nostrils flared at the strong scent of full-blown heat and eyes widened at the realization, his hand sliding further between trembling tights and into soaked panties, “Were you trying to take care of your fucking self this whole time!?”
Izuku whined, “I didn’t when to be an inconvenience.”
The Alpha rumbled, pulling away the fluffy blanket with his free hand while his two middle fingers pushed into the Omega’s lower lips. Pale, freckled legs spread in response and the smaller male keened with his head thrown back. Eijiro startled at the sound but Katsuki snarled with teeth bared to make sure he stayed right where he was.
The blonde leaned close to Izuku’s panting face to growl low into his ear as he finger-fucked him, “We are here to fucking serve you, not the other way around. What do you want Freckles? Just my fingers? My tongue? My Cock?”
Instead of verbal answer, the Omega pushed Katsuki’s hand away, stripped off his slicked underwear, and rolled over to present himself. There was a touch of fear, of anxiety in his intoxicating scent, his body was quaking with uncertainty, but he whimpered again, spreading his thighs wide. Both Alpha’s groaned.
For the love of everything good in the world, all those oversized clothes covered something amazing. The way Izuku’s spine arched with his ass in the air, the curves of his thighs, hips, and waist and his fucking pussy. It was so pretty and pink, with plush lips covered in slick and they knew there was a little cocklet to match, bowing as much as it could against his green, ruffled pubes. Katsuki moved to run his hands along the soft skin presented him and Eijiro cataloged the sight for when he was alone.
“Fucking shit, you’re gonna kill me,” the Prime gritted out as he pulled off his boxers to throw elsewhere. “Gonna fucking knot you so well, fill you up and pup you because that other Alpha had to be shooting shitty blanks. Just fucking look at you.”
“Please, please Alpha,” Izuku begged, with his head laying on the nest and wet eyes looking back, “please.”
“I got you, precious, I got you.”
Katsuki scooted forward, clawed fingers grabbing the soft globes to spread them a little further and moaned in appreciation. Leaning over the presenting Omega, he then kissed at the nape of his neck the heat collar he wore didn’t cover. A hesitant purr left the little thing’s throat like he had to appease the Alpha to get what he needed. Katsuki would find Izuku’s first Alpha and skin him.
Moving to grab his cock and guide it into the quivering cunt awaiting him, the blonde Prime whispered, “You let me know what you fucking want, when you fucking want it, and how you fucking want it. Don’t hold back.”
Izuku gasped as Katsuki’s thick dick breached the puffy, wet lips of his pussy. It had been years and it almost felt like the first time, except he wanted this Alpha. His gasp turned into a whine as the blonde pushed deeper. Finally, he was getting a touch of true relief. Nothing like the heats spent alone with silicon fakes and his fingers.
“Please, I want more. Can I have more?”
“Oh fucking gods, you can have it all,” Katsuki huffed. “You want it fast, little bunny, or slow?”
Moaning as the Alpha pulled out slowly, the omega could only answer, “I don’t know.”
Katsuki growled in reply, “We’ll start slow and work our way up, yeah?”
Izuku nodded in agreement and let the blonde take care of him. It felt amazing. The Alpha’s hands were firm but gentle. His hot breath fanning against his shoulder blades and neck with every thrust. The Omega couldn’t help crying out with every plunge, his inner Omega happy with his partner this time. Katsuki did exactly as he said, the pace picking up every few moments, as if he was waiting for Izuku to tell him when.
Soon, the jade-haired Omega was being fucked into the nest, his tiny claws clinging to the blankets and clothing that covered its very foundation. He could feel his orgasm coming to the surface and feared the idea of reaching his climax before the Alpha that mounted him. His last Alpha, the only other Alpha he had ever had, wouldn’t knot him if he came too soon. He was also afraid of telling Katsuki to slow down, he was the Omega, he shouldn’t command anyone.
He came with a sob. Katsuki slowed his movements and cursed through his teeth. Izuku’s mind became frantic and he cried more.
“I’m sorry! Please, please don’t leave me like this! I didn’t mean to cum already, I’m so sorry!”
“Whoa, whoa! Hey, calm down! What the hell!?”
Katsuki was utterly confused. Izuku had just cum, he thought the Omega would get a moments relief while they decided if they should change positions or not. Instead, he smelled terrified with begging apologies leaving his mouth like he had done something absolutely offensive while taking the blonde’s cock. Fuck, if anything, Katsuki had been proud of getting their newest pack member to climax without his knot, especially during a heat.
He wrapped his arms around Izuku’s middle and mouthed at his nape in a calming form of scuffing, while he rumbled, “It’s okay, Freckles. Nothing is wrong. Just breathe. Do you want to go on your back next? Maybe sitting in my lap. What do you want, precious?”
“Whatever Alpha wants,” the Omega underneath Katsuki whimpered.
“No. What did I fucking say earlier? Shitty Hair and I are here to serve you, Short Stack. We are yours until this heat passes, and for every other heat unless you choose otherwise,” he countered. “So, what do you want, Omega? Or do you want Shitty Hair now?”
Izuku shook his head and sniffled, “No, want Kacchan right now. Want to make up for cumming without him.”
“Make up? No, fucking cum are many times as you fucking can. Feel as good as you want. Hell, I’ll eat you out as you sleep to give you the best dreams,” the Alpha grumbled as he started rocking his hips in need of friction on his wet dick. “Now, tell me, do you want to keep fucking like this, or do you want a change, precious?”
Already panting, the Omega whined, “I want to see Kacchan’s face.”
“We can make that happen.”
Carefully pulling away, Katsuki watched Izuku roll onto his back looking bashful as he spread his legs again. Eijiro reached out, running a hand through the Omega’s hair as the blonde Alpha resituated himself between pale thighs, fingers gliding along supple skin. Then, without thought he leaned down to kiss trembling lips as he began pushing in.
Izuku gasped against his mouth, slender arms wrapping around his neck as the Omega’s hips lifted to take more of Katsuki’s dick. The Alpha’s large hands gripped soft asscheeks as he answered the action, trying to devour peach lips at the same time. For fuck’s sake, this little being was addictive and Katsuki hadn’t even knotted him yet. He tried start slow like before, his pace picking up when Izuku pulled away and started pleading.
“Pleeease, Alpha, please, just need your knot, pleeeease!”
“Fucking shit, yeah, you’ll get my knot,” he growled in response, thrusts turning rough, knocking the air out of the one beneath. “Get all the fucking knots you want. Shitty Hair and I will pup you your first heat and watch you grow big and round.”
Izuku whimpered, “I can’t, ah, have pups.”
“Fuck! Yes, you can. I promise you,” he rumbled into the Omega’s collared throat, “if not this time then the next.”
Eijiro roughly chuffed in agreement next to them, stroking his own cock as he licked his lips to the show. If this Omega was sterile then his heat scent was a fucking lie, because it smelled like it came straight from a goddess of fertility. Holy shit, he hoped he was chosen next round. He couldn’t wait to have his nose against Izuku’s throat to get his scent fully and uncontaminated by the other scents in the penthouse.
The way Midoriya arched to take more of Bakugo’s cock, fucking shit, this was the best heat porn he had ever witnessed. Those hips rolling with every thrust, small hands searching for purchase wherever they could, and his moans, whines, and whimpers could make him come in seconds if he allowed them. Add to all this Izuku’s scent, when the pack came the next day, Eijiro knew they would both be overly protective.
That’s when, in the back of his mind, his Alpha recalled Bakugo talking about the neighbor down the hall. As soon as this was over, and Izuku spent a day or two resting, they would have a talk with that pervert. He had tried to call over Denki every time he had arrived for heat too, like he had a right to every Omega who came within eyesight. He was disgusting.
Izuku suddenly keened, both Eijiro and his Alpha becoming focused on the pair again. The blonde Alpha was on his knees now, holding the freckled hips up as he slammed into them. The green-haired Omega clung to Bakugo’s forearms with clawed fingers, whimpering and whining. Fuck, Izuku may be small, but there was muscle behind the grip of his hands and the way his legs wrapped around the other Alpha’s waist.
Katsuki was feeling like he was about to go feral. His eyes were closed and his head back as he felt his growing knot moving in and out of this Omega’s pretty, pink cunt. How in the hell did any Alpha turn down knotting Izuku? Were they insane? Were they that full of themselves? Fuck, fuck, FUCK! He just wanted to knot him and feel himself being milked by these delicious being.
He screamed when it happened, the Omega’s pussy turning into a fucking vice as his whole body shook. They dropped back to the nest as Katsuki’s dripping canines automatically clenched around the thick leather that covered Izuku’s throat. Snarling around the collar, hips jerking against that plush ass, all that filled Katsuki’s mind was breeding the one below him as long as physically possible.
“Ka-ka-Kachaaaaan!” Izuku squealed, hands burying in thick blonde hair. “Good Alpha, good Alpha!”
Unhooking his fangs from leather, Katsuki rubbed his cheek against the Omega’s, “Fuck, you feel so good. Such a good Omega, taking my knot, feeling so perfect, smelling like fucking sin.”
Then Izuku started purring. It was a tired, lazy one that had both Alphas crooning and chuffing in response. Eijiro and Katsuki watched the Omega’s eyelids fully droop to cover those big, green eyes as he fell into an exhausted doze. Continuing their sounds of comfort, the pair of Alphas were content to bask in the sight and scent of a calm and sedated Omega in heat.
A little while later, the head Alpha left the nest to get damp towels to clean Izuku and himself. He moved a cooler of water bottles close to the nest before getting started on wraps and finger foods that could be eaten cold or easily reheated for when those emerald eyes opened back up. Kirishima stayed in the large nest, curled about the sleeping Omega while scrolling through texts in the group chat. Come tomorrow morning, the penthouse would be full of pack members.