Work Text:
4 PM
The common room was a different kind of beautiful when they had it to themselves.
Izuku closed his eyes for a moment to take in the peace of the space where only the sounds of branches swaying in the wind, rustling against the windows gently, and Katsuki’s pencil moving against the paper could be heard. He sighed. He loved these quiet moments with Katsuki, where they sat in comfortable silence sharing the same space, they made him feel safe. Katsuki’s thigh brushed against his own under the table they were sitting at and Izuku felt it press against his assuring him of his presence and communicating his affection with just a small action. Izuku smiled.
A ray of sunlight shone through the expansive windows to his left illuminating the mess strewn about the table. Notebooks, laptops, highlighters, textbooks, Izuku had brought everything along to study with Katsuki for the afternoon, who was diligently taking notes from his laptop screen across from him. As the blond leaned forward to continue his writing his hair fell into the sunbeam casting light onto their space and Izuku marveled about how Katsuki’s hair glimmered like fine silk and gold. He wanted nothing more than to reach out and run his hands through it. So he did.
“If you keep that up there’s no way you’re gonna learn all this in time for the exam next week, nerd,” Katsuki said, breaking the silence.
“I’m just taking a little break,” Izuku defended himself, his hand remaining in Katsuki’s hair and continuing its weaving motions through strands of blond locks.
Katsuki offered up a hum in response considering Izuku’s lame excuse for slacking off from his studying, or perhaps it could have also been in satisfaction as Izuku scratched his nails into Katsuki’s scalp.
“You said that ten minutes ago dumbass,” Katsuki countered. Finally the blond looked up from his notes and held eye contact with him. Izuku couldn’t help the way his breath hitched inaudibly. He didn’t think he would ever get over the sight of how beautiful those fiery red eyes were when they looked back at him.
“Well how am I supposed to concentrate when I have something so much more beautiful to look at?”
“Alright,” Katsuki groaned, but Izuku didn’t miss the faintest blush that spread across his cheeks. “If you don’t start studying I’m gonna hold your head down so you can ONLY look at your fucking textbook.”
“Okay, okay,” Izuku conceded through a laugh. He had no doubt that Katsuki would make good on his threat, so he shifted his focus down and got back to work.
He had immersed himself back into his studying pretty quickly, when not even five minutes of reading passed and Izuku could feel the weight of eyes on him. Noticing that the sound of Katsuki’s pencil had stopped, he looked up through his lashes only to be met with Katsuki’s undivided attention on him. If Izuku had thought Katsuki’s eyes had looked beautiful before they were practically shining now as he looked at Izuku with nothing but pure fondness and a growing smirk.
“So I’m not allowed to admire you, but you can look at me all you want?” Izuku stammered, knowing full well he was bright red.
“I finished my work so I’m allowed to stare all I want,” Katsuki teased in a low tone, refusing to break eye contact with him. Izuku blushed impossibly further.
“That seems a little unfair, Kacchan,” Izuku argued, trying not to get flustered from the comment.
Katsuki crossed his arms on the table and leaned forward, propping himself up so there was only a half a meter of space in between them. “Then you better get your work done faster, Deku.”
There was no way Izuku was going to finish his homework. Not with the way Katsuki was staring him down with a sinister smirk. Izuku crossed his arms and propped himself forward too to lessen the gap between them even further.
“And what if I don’t want to finish my work?” he asked.
Katsuki’s eyes actually lit up at the comment and his smirk grew into an almost feral grin. Izuku caught his eyes glancing down to Izuku’s lips before shooting back up to his eyes. The tension in the air between was thick enough to cut through and Izuku held his breath waiting for Katsuki’s response. Katsuki looked just about to tease back or maybe even just go for it and lean all the way in, when suddenly Katsuki’s phone buzzed to life on the table. The abrupt disturbance in the heated silence they had been holding was enough to cause Izuku to jolt slightly.
Katsuki let out a loud groan rolling his eyes in very obvious annoyance. Izuku gave an awkward smile in response, shrugging his shoulders as Katsuki sat back down in his seat and went to answer his phone, his lips already curling into a sneer. Izuku couldn’t help being a little pleased that Katsuki was as invested as he was in their flirting.
“What the fuck do you want Shitty Hair,” Katsuki greeted on the phone, if you could even call that a greeting.
Izuku sat back in his seat as well and turned back to his textbook. He wasn’t sure how long Katsuki would be since Kirishima loved to talk on the phone, but he was fine with trying to get a little bit of studying in before he would inevitably get distracted again once Katsuki was done.
“Can you quit whining? It’s not the end of the fucking world… No, we’re already training together tomorrow… I just trained with you on Monday what do you fucking mean you needy shit?!... If I do then will you leave me alone, I’m in the middle of something… Fine, fine… whatever, bye.”
Katsuki hung up the phone and let out an exasperated sigh, leaning fully back in his seat. Izuku perked his attention up from the reading. He’d obviously heard Katsuki’s end of the conversation, but he was curious what Kirishima had wanted to make Katsuki so annoyed.
“Kirishima wants to train together tomorrow. He’s got a new idea for a move that he wants to test out against my blasts,” Katsuki started. “I know you and I are training tomorrow so for the last half hour I told him I’ll blast the shit out of him for a little.”
“That’s okay,” Izuku said, and he meant it genuinely. While he and Katsuki would always spar with each other every Friday during free training, it wasn’t out of the ordinary for one or both of them to spend some of that time working with other classmates. Sure he was a little annoyed that Kirishima pulled Katsuki away a little more frequently than others sometimes, but he knew that at the end of the day he’d have most of the session to spend with Katsuki. ”I’ll train with Todoroki at the end of class while you help Kiri-.”
“Hey guys!” A voice called out in a sing-song cadence. It looked like their peaceful studying together had come to an end for the afternoon. “You studying for next week?”
“Hi Kaminari,” Izuku greeted cheerfully as the electric blond approached their table, and at the same time as Katsuki said,
“Yes, go away.”
“Aw come on Kacchan I need help with my studying too?” Kaminari whined, planting his hands on the table and leaning into both of their spaces.
Izuku felt his stomach knot up a little bit and his chest got hot. It always happened when Kaminari called Katsuki “Kacchan” in front of him. He had been doing it ever since they started school together three years ago, and even though it still bothered Izuku then, now that he and Katsuki were dating and had been for quite some time, Izuku was especially sensitive to it and couldn’t help the white hot heat that formed in his chest every time he heard the name Kacchan come out of anyone’s mouth but his. That was his nickname for Katsuki, that was his boyfriend. No one else should be saying that but Izuku.
Izuku swallowed his pride and erased any signs of distress from his face, offering Kaminari a warm welcoming smile, despite the fact that this was their second time being interrupted now.
“Get the notes from Shitty Hair. I already explained it to him,” Katsuki grumbled.
“But you’re such a great tutor,” Kaminari continued to whine, now leaning more into Katsuki’s space to pull his attention out of his notes. “Kiri and I would be so lost without you.”
Kaminari brought the back of his hand to his forehead and pretended to dramatically faint.
“Get lost already! Just be lucky I’m still tutoring your asses next week.”
“Yay! Thank youuuu!”
Kaminari then leaned into Izuku’s space and loudly whispered to him, “Isn’t our Kacchan just something else?” Izuku didn’t even have time to process the remark before the blond had pushed away and headed for the kitchen.
Izuku could feel heat rush to his head instantly and he was sure he was bright red again, only this time from anger. Our? Our Kacchan?
“Fuck that was annoying,” Katsuki sighed, pulling Izuku away from his thoughts at the moment right before they were about to run wild. The combination of Kirishima whisking Katsuki away from training with him tomorrow and Kaminari using his nickname with his boyfriend had left his nerves feeling shot. He couldn’t bring himself to say anything in response to Katsuki, not trusting the words that would come out of his mouth if he opened it to speak.
Katsuki seemed to notice this and looked up at Izuku skeptically, his eyes narrowing. “Hey, what is it?”
The question shook Izuku out of the rage that was beginning to fester in his chest and he swallowed hard, forcing a smile. “Hm? Nothing, I’m fine!”
Katsuki didn’t seem convinced, his eyes narrowing further as he stared Izuku down. After a few tense moments he seemed to consider something and got up from his seat. He moved to Izuku’s side of the table and pulled Izuku’s chair out so he was now facing the blond. Before Izuku could ask what he was doing Katsuki grabbed his chin, more delicate than he would have anticipated, and pulled Izuku into a gentle kiss. Izuku could feel his tension drain out of his body as his mind turned to mush and he melted into Katsuki’s kiss.
“I know you desperately wanted me to go all out on you tomorrow during training. But how about…” Katsuki kissed him again. “Let’s go get dinner, just you and me, I think you’ve had enough studying,” Katsuki whispered against Izuku’s lips before leaning back in to plant a kiss on his jaw. “And then tonight you can spend the night with me.”
Izuku was almost embarrassed by the involuntary whimper that he made. All of his thoughts had zeroed in on the mischievous glint in Katsuki’s eyes and the way his breath felt across his lips.
“I like the sound of that,” Izuku whispered back, feeling considerably lighter than before.
They packed up their school work and Katsuki led him by the hand back to his room so they could drop their things before heading out. If Katsuki knew something was bothering Izuku, he didn’t say anything, but Izuku suspected he knew exactly what Izuku was thinking and feeling. He knew he should talk about it with Katsuki instead of letting it fester like that, but now with the prospect of dinner and spending the night with his Kacchan, those feelings of anger seemed much farther away. By tomorrow Izuku was sure it would have all blown over.
___
It didn’t get better the next day.
In fact it was considerably worse.
Afternoon training had gone great for the first half of the session. He and Katsuki had been able to train together for an hour perfecting a combo attack move they had been working on to near perfection. Izuku was sure that it would become a signature move of theirs once they were pros and had opened their agency together. With the way they fought side by side together and the way they understood each other's moves and capabilities, there was no question they would be a force to be reckoned with against any villain.
Now with their training period nearly done Izuku’s Danger Sense sent a sharp pain through his head and he dodged left from a wall of incoming ice. He and Todoroki had been sparring for the last thirty minutes and Izuku was zoned in, dodging nonstop attacks of fire and ice. Izuku used Smokescreen to create cover between them and maneuvered himself behind his friend, going in fast with a Black Whip binding move courtesy of extra training with Aizawa.
Todoroki grunted and fell to his knees as Izuku’s attack landed and sufficiently incapacitated him.
“Thought you’d be used to fending off attacks like that after spending so much time training with Sero, Todoroki,” Izuku taunted as the smoke cleared. Todoroki fought against the restraints for a few moments more before looking over his shoulder to give Izuku a playfully annoyed look.
“I can actually see Sero’s attacks coming when we spar together,” Todoroki countered. Izuku laughed a little to himself before releasing his hold of Black Whip and setting Todoroki free. Todoroki rolled his wrists and rose to his feet. “You’ve come a long way with Black Whip, Midoriya, I’m impressed.”
“Thank you, Todoroki! Aizawa sensei has been helping me lately to hone it more into a capture weapon like he does with his scarf and I think it’s helped a lot!”
“I always enjoy it when we get to spar-.”
“DIE!!!”
Izuku’s head whipped around at the interruption, as he was sure Todoroki’s did as well. He watched as Katsuki landed his loudest explosion of the session, on what he assumed was Kirishima, through a cloud of fire and smoke. In the aftershocks of Katsuki’s explosion Izuku could hear grunting and panting breath before a bright laugh cut through the silence.
“Ha! See I told you I’d been working on my new Unbreakable stance Blasty! Not a scratch on me and I didn’t even move!” Kirishima called out excitedly.
As the smoke cleared, Izuku watched Katsuki’s fierce expression morph into one of surprise at the lack of effect his blast caused.
“Shit, what the hell Shitty Hair, you didn’t even budge.”
“I know right! I’ve been practicing since the last time we spared to be able to completely withstand your impacts and I think I finally got it!”
“I’ve gotta say I’m impressed,” Katsuki complimented. Kirishima beamed at the praise and raced over to him, his words indiscernible from the distance, to go in for a bunch of fist bumps and high fives. Izuku smiled. He was glad Kirishima had finally perfected his move and was proud of him. He was about to go over to the two of them to offer his congratulations before Kaminari stopped him in his tracks.
“Kiri’s unbreakable from even Kacchan now, way to go man!” Kaminari cheered as he approached the two of them.
Izuku felt his heart sink.
“Thanks dude! Bakugo is always the perfect partner to go up against, he fights like a beast! We’ve gotta do this more man!”
“Yeah, yeah, we’ll see,” Katsuki grumbled, the hint of an assumed smile on his face.
“Bet you couldn’t take us two on one, hm?” Kaminari teased, leaning into Katsuki’s space to egg him on.
“Like hell I could! That’s light fucking work,” Katsuki jeered, pushing Kaminari away by the face.
“So you wanna go Blasty?” Kirishima added to the challenge.
“Ugh I hate you both.”
“Nah you love us.”
“Kacchan is just so amazing.”
“Midoriya? Are you-...”
Izuku was seeing red. He could vaguely pick out Todoroki’s comment of concern from his right, but it was lost in the ringing in his ears and the pounding of his chest. From head to toe his entire body felt like it was on fire. He knew it was illogical, he knew he shouldn’t be this angry over a stupid nickname, but it was his stupid nickname. His nickname for his Kacchan. Was this a joke? Did Kaminari know that doing this made Izuku’s blood boil? It didn’t even matter, Izuku didn’t care, he needed to get out of there.
“Midoriya?” Todoroki tried again. Izuku caught a glimpse of green lightning sparking from his hands and the flash of light pulled his attention away. One for All had sparked to life across his knuckles that were bone white from squeezing his fists so tightly. His eyes were stinging. Fuck. Don’t cry over something so stupid, you idiot.
“I’m gonna head back to the dorms early, Todoroki. It was great sparing with you today,” Izuku managed to choke out, sounding so eerily robotic and fake he internally cringed at the sound of his own voice.
Without waiting for a response from his friend, he turned away, not being able to look at or listen to anything anymore. His nerves felt frayed, raw, his body a livewire. Everything felt numb and simultaneously far too overwhelming all at once.
It was by autopilot that he managed to gather his things from the gymnasium wall and head for the door. His exit was discreet. He didn’t cause a scene or draw the attention of his other classmates who continued to train. His anger was quiet. Seething and silent. And as the door to the gymnasium swung closed with Izuku finally making his escape, Katsuki’s eyes were glued to the back of his head.
___
“Okay spit it out, nerd.”
Izuku had his head buried in his notebook at the same table he and Katsuki had been using for studying the night before, when Katsuki’s voice pulled his head up.
“What?” Izuku barely had time to think of a response better worded than that, before Katsuki had his hands planted on the table and was leaning into Izuku’s space.
“I said spit it out. You think I wouldn’t notice you ducking out of training like that, Deku,” Katsuki pressed. Izuku felt himself flush in embarrassment. He had tried to do his best not to have anyone notice his early leave. “You’ve been acting weird since last night and now you leave training early? You never do that. Explain that shit now,” Katsuki demanded.
“I was just… I was tired from sparring with Todoroki, we wrapped up early so I came back here to finish studying before the weekend began,” Izuku stammered out. It wasn’t a complete lie, he did want to finish his studying before the weekend so he would have more free time. He just left out a few… key details.
“You’re a shitty liar, Deku. You always have been.” Katsuki searched Izuku’s face like his expression would give way to the answer he was searching for. A few moments of silence passed between them, Izuku not sure how to even begin to explain the mess of emotions he felt during the afternoon. Then Katsuki’s expression shifted. His eyebrows knit together ever so slightly and the corners of his mouth dropped, he looked like he was thinking hard about something, but more than that he looked worried. Katsuki leaned away. “Come on seriously, what’s up? Did I… do something?”
“No. no, no!” Izuku said immediately. “No you didn’t do anything, I- I just…” He wasn’t sure how to continue, his words getting caught in his throat.
“Just what?” Katsuki’s expression had shifted again to curiosity.
Suddenly Izuku felt stupid, he felt dumb, he felt like he was blowing this all out of proportion. It was a silly nickname, it didn’t mean anything. Kaminari was their classmate, their friend, he didn’t have any malicious intent in his use of the Kacchan nickname, and Izuku knew this. And yet… it continued to bother him.
Izuku let out a frustrated sigh.
“Why does Kaminari get to call you Kacchan too?” he said finally.
Clearly it wasn’t what Katsuki had been expecting Izuku to say and his eyebrows knit together in confusion.
“Hah?”
“Guys! Hey!”
Izuku could actually feel his body temperature rise several degrees at just the sound of Kaminari’s voice. Were they not able to have two seconds alone to talk this out? His frustration was written all over his face as the electric blond approached them.
“You guys still coming out with us tonight? Kiri just wanted to get a head count so we can figure out getting there,” Kaminari pressed, as enthusiastic as ever. Izuku had completely forgotten. Some of their friends had made plans with them for tonight to try the new karaoke bar that had opened up in town. Izuku had been excited about it at the beginning of the week, but now he wasn’t sure he had the energy to socialize with any of them, namely Kaminari, after how annoyed and angry he had been the last two days. Still though, Todoroki would be there, and Uraraka, and he had begged Katsuki to come with them too. Backing out now would just make it more obvious how not okay he was.
“Yeah, yeah, we’re going to your stupid bar with you. Don’t fucking rush me,” Katsuki supplied to Kaminari, after Izuku had failed to provide a response. He caught Katsuki glancing at him through the corner of his eye and knew he was thinking over what Izuku had just said before the interruption.
“Yes! Alright, Midoriya make sure you get this one there on time, we leave in an hour! Better look nice Kacchan!” And with that Kaminari was gone again, leaving the two of them in tense silence. The air felt charged with electricity, and Izuku didn’t trust himself to speak. He kept his eyes glued to the page in front of him, noting the shifting of Katsuki to his right.
“Deku–,”
“Let’s go get ready,” Izuku cut him off with the closing of his textbook, admittedly a little too loud. He scooped his things from the table in one sweep disregarding how his books nearly fell from his arms and turned for the elevators without a second word.
“Fucking-,” Katsuki let out an aggravated groan from behind and stomped after Izuku. “Fucking stop will you!”
Izuku got to the elevator and waited for the door. “It’s nothing, I’m fine.”
“Like fucking hell it is! What did you mean before?”
“I don’t want to get into it, Kacchan.”
“So what I just have to figure it out myself, just fucking talk to me, Izuku!” Katsuki was clearly annoyed at Izuku and his tone carried an angry desperation to understand what Izuku had meant. The elevator doors opened and the two of them entered the car. It wasn’t until the door closed and they were completely alone did Izuku speak again.
“Why do you let Kaminari call you Kacchan?” Izuku asked him again, this time with more bite in his voice. He didn’t mean to direct his anger towards Katsuki, he really didn’t, but in that moment he could feel all of the emotions that had been festering for the last day starting to seep out.
“Let him? What the fuck does that even mean?” Katsuki shot back harshly, matching Izuku’s energy.
“It means exactly what I said!” Izuku snapped back.
The elevator door opened and Katsuki stormed out of it before Izuku could, making his way to Izuku’s room. Izuku sighed, feeling his simmering anger start to subside. He had no right to be angry with Katsuki, nor the right to take that anger out on him. His anger started to morph into guilt and he followed behind Katsuki. When he got to his room Katsuki had already plopped down on his bed and was staring daggers at him.
“I deserve a better fucking explanation than that Deku, and you know it,” Katsuki hissed. Izuku deflated.
“I’m sorry, I didn’t–,” he took a deep breath to steady himself. “I didn’t mean to lash out at you. It’s not you. Not at all. Kaminari has just… been getting to me lately.”
Katsuki’s eyebrows furrowed again like they had downstairs.
“Because he calls me Kacchan too,” Katsuki supplied. It wasn’t a question, he said it like a statement of fact with no judgment attached to it. A beat of silence passed between them. It was enough for the rest of Izuku’s dam to break and his first tears fell.
“I know it shouldn’t get to me, I know it doesn’t mean anything,” Izuku sniffled, trying to hold himself together. Why the fuck was he crying. He didn’t want to cry over this. “But I’ve always called you Kacchan. It’s my nickname.”
Katsuki didn’t say anything to that, instead taking in Izuku’s reaction in quiet consideration, almost encouraging him to continue.
“And before we were together it still bothered me, but I couldn’t really say anything about it at the time, and you never corrected him either so I would let it go. But then we started dating and Kaminari kept doing it and it would just feel like a slap in the face every time he said it, and when I called you Kacchan it would feel less special, and I just want it to be mine.”
Izuku rambled and blubbered and choked out his feelings, the feelings he had been keeping to himself for a long time about the matter, and Katsuki didn’t interrupt him once. The blond listened intently and when Izuku had finished he waited for Izuku to take a deep breath before he spoke.
“Why didn’t you tell me sooner?”
Izuku flushed hot again in embarrassment. “I don’t know, I didn’t want to sound crazy.”
Katsuki huffed and gestured for Izuku to come closer to where he sat on the bed. Izuku shuffled his way over and Katsuki reached for his wrist pulling him forward the rest of the way into a hug, his head landing on Izuku’s chest and his arms winding around Izuku’s waist. Izuku tensed for a moment then allowed himself to relax into the hug, wrapping his arms around Katsuki’s head.
Silence passed between them for a full minute before Katsuki pulled back and held Izuku at arms length so he could make eye contact.
“If it’s something that’s bothering you, it’s never crazy. You taught me that, heed your own advice sometimes won’t ya.”
Izuku snorted, a small smile breaking through his lips. “I know, I’m sorry.”
“And don’t apologize either, fuck,” Katsuki grumbled.
“I am though, I should have brought it up sooner instead of letting it fester for so long,” Izuku admitted, pulling Katsuki onto his feet and back into a hug, this time his head could nuzzle into Katsuki’s neck. Fresh tears had sprung in his eyes and he knew Katsuki could feel them hitting his skin.
Katsuki took a deep breath and returned the embrace. “I’m sorry too. I didn’t know how much it bothered you. For the record I’ve always hated it. I just never really thought about how it might have made you feel too.”
Izuku sniffled and squeezed the blond tighter.
“And I’ll make sure Kaminari doesn’t pull the shit anymore,” Katsuki supplied, pulling back from the hug to look at Izuku.
“Thank you, Kacchan. I’m sorry aga-.”
“I swear to god you better not apologize again.”
Izuku laughed, feeling considerably lighter than before. He could still feel a twinge of something that was yet to fully dissolve lurking in the back of his head. He was sure though that once he saw the change in Kaminari’s usage of Kacchan he would be able to forget all about it and move on.
“If something is bothering me, I promise to say something,” Izuku corrected the apology from his former statement.
“That’s better.” Katsuki reached forward and ruffled a hand through Izuku’s green curls. He smirked. “Now come on, let’s get ready and get this shit over with, I don’t want to be out all night with these losers.”
___
An hour later found Izuku and Katsuki waiting in front of the dorms with Kaminari, Kirishima, Todoroki, and Sero.
Considering the way he and Katsuki had left things before coming down to meet up with everyone, Izuku thought he would feel a lot more at ease. He had finally spoken up about what had been bothering him and received support and reassurance from Katsuki that left him feeling heard and understood and loved. But the actual problem hadn’t been addressed yet; the fact that Kaminari could still at any moment let that name slip at any second, still left a buzzing feeling in Izuku’s chest that felt ready to snap. Izuku did his best to push it aside as the six of them conversed, waiting for the girls to come down to meet them.
While they had all gotten dressed up for the evening, Katsuki was easily the best dressed one there. With his maroon shirt unbuttoned around his neck, fitted dress pants that had Izuku nearly breaking his neck to check out the blond, and the gold bracelet Izuku had gotten him twinkling on his wrist, the man looked of pure sin. Izuku could feel Katsuki’s eyes on him too, looking him up and down with an equally sinful look that matched his outfit. In the middle of the conversation he felt Katsuki’s hand wrap around his waist and land on his hip pulling him closer to his side. The action was enough to make Izuku dizzy and wipe any other worry from his head.
“I’ve been trying to get Sho to watch Bleach with me for weeks now!” Sero was in the middle of ranting to the group.
“I want to watch Fruits Basket next,” Todoroki replied.
“Ooh buddy I’d wait on that one,” Kirishima warned, reaching up to scratch at the back of his neck. “It’ll wreck you.”
“I heard it was good though?” Todoroki asked, confused.
“He just means it’s real heavy emotionally Sho, not really a pick me up,” Sero clarified. “And we just finished Devilman Crybaby. I think we need a break from the heavy stuff for a little bit.”
“Kacchan and I have been watching Hunter x Hunter recently. That’s been pretty light and super fun, you two should try that!” Izuku joined the conversation enthusiastically.
“I wouldn’t peg Kacchan for watching anything other than Attack on Titan,” Kaminari interjected. “How’d you convince him to watch that, Midoriya?”
“Knock the fuck off with the Kacchan. It’s annoying as fuck,” Katsuki growled out immediately, before Izuku had a chance to even react. He felt the hand on his hip tighten protectively, and his heart swelled simultaneously in fondness at the action and anger at the comment by Kaminari.
“Aw come on! Midoriya always calls you Kacchan, what’s the big deal?”
“Just because he does doesn’t give you a fucking go ahead Dunce Face, cut it out.”
“Ah, whatever,” Kaminari laughed.
He wasn’t taking it seriously. Izuku could tell that the electric blond still thought this was still a joke. He didn’t think it was a big deal. It was. Izuku felt his entire body tense, the heat burning in his chest threatening to set fire to his entire body. He was more than angry, he was completely over it. All of it.
Just then a crowd of some other third year students passed behind them, pushing their group forward on the sidewalk to avoid being bumped into. As they moved and Iuzku stepped away from Katsuki, he watched as Kaminari brought his hand up, placing it on Katsuki’s back to shield him from the oncoming traffic. That was it. The tension in his chest snapped.
“Kaminari,” Izuku practically growled. “Put your arm down.”
The entire group froze. The shift in mood was immediate, washing over everyone in a thick tension. All eyes fell to Kaminari’s hand that had landed on the small of Katsuki’s back, and then slowly dropped down. No one spoke, even the wind stopped blowing, until Kirishima spoke up to defuse the atmosphere.
“Hey, it’s okay Midoriya,” Kirishima started gently. “I’m sure he didn’t mean anything by it, really!”
“Kirishima,” Izuku interrupted, the icy tone remaining in his voice. “Stop.”
Kirishima gulped and took a step back.
“Whoa, take it easy Midoriya,” Kaminari finally spoke up, a clear nervousness in his tone. “Kacchan is all yours.”
“You,” Izuku started. He was dead serious, and that comment had poured gasoline on Izuku’s already burning chest. “Shut the fuck up with your Kacchan this, and Kacchan that all the fucking time.”
“Huh?” Kaminari’s brows shot up his face. He looked genuinely surprised at the reaction Izuku was having to his words, maybe even a little remorseful in the moment, but Izuku didn’t care.
“It’s MY nickname for MY Kacchan. Not yours. So for the love of God stop fucking using it Kaminari,” Izuku was gritting his teeth, spitting out each word with venom, in a voice his friends had never heard him use before. “I can’t fucking stand it anymore, if I hear it come out of your mouth one more fucking time you’ll regret it.”
He didn’t yell. Izuku’s rage was deadly serious, searing and harsh. His knuckles were crackling with green lightning, he knew it, he didn’t care. His gaze locked into Kaminari’s drilling into his skull the severity of his words. The air between them all crackled with electricity. No one dared to say anything, least of all Kaminari. Izuku had made his point.
The silence persisted. No one knew what to say next. Through the haze of rage, the fleeting thought that Katsuki hadn’t spoken up through this exchange briefly crossed his mind before his anger washed over him again.
He wasn’t sure how much time had passed since he had last spoken. Maybe it had only been a few seconds, maybe it had been a full minute, but suddenly he felt a strong hand grab him and start to pull him away. It took a second for Izuku to register what was happening, until the door to the dorms swung open loudly and he realized Katsuki was leading him back inside and pulling him forward. Izuku’s mind struggled to catch up with what had just happened, how he had just snapped at Kaminari. He didn’t regret speaking up, or even regret the way he had gone off on the man, but as Katsuki continued to pull him to the stairwell, he couldn’t help but feel the beginnings of guilt for acting out like that after he and Katsuki had already discussed it together.
Katsuki slammed open the door to the stairwell and the sound echoed loudly. Was he mad at him for his outburst? For getting angry and acting possessive like he owned Katsuki? The grip on his hand finally loosened and Katsuki pulled him so Izuku’s back was against the wall. Katsuki planted both hands on either side of Izuku’s head and finally looked at him. His red eyes were burning with an emotion that Izuku couldn’t quite place.
“Kacchan I am so sor-,” Izuku tried to begin before the blond could go off on him.
But instead of being met with the force of Katsuki’s words, his sentence was cut off with a hard kiss, desperate and hungry. Izuku’s eyes fluttered closed naturally, and as he began to return the kiss Katsuki returned it even fiercer. His right hand moved from its place on the wall to Izuku’s hip to bring them flush to his with an iron grip.
Izuku sighed out a whimper and Katsuki used it as an opportunity to slip his tongue in and lick into Izuku’s mouth with pure need, all of the energy he radiated dripping with desire. Izuku could feel his body melting in Katsuki’s grasp, as he returned each scorching kiss with one of his own making small needy whimpers every time Katsuki bit at his lower lip or anytime he dragged a low groan out of the blond.
As he went in for more Katsuki suddenly pulled back, not enough to create a large space between them but enough to leave Izuku chasing his lips. Both of them were panting heavily, an air of lust hanging between them and both of their lips swollen and shining in the dimly lit stairwell. Izuku held eye contact with Katsuki through his lashes. The blond’s eyes were lidded and his ruby irises burned with that same emotion from before, only now Izuku could identify it, devotion.
“That,” Katsuki rasped out finally, breaking the quiet between them. “May have just been the hottest thing I’ve ever heard come out of your mouth.”
Izuku didn’t know how to respond to that, and apparently his surprise was written all over his face because Katsuki just chuckled, the smirk of his face enough to send a coiling heat to Izuku's stomach.
“I- I didn’t mean to get angry at him,” Izuku stammered out, still dizzy from the kissing.
“Fuck, are you kidding,” Katsuki sighed. He leaned back in only this time his lips began to kiss along Izuku’s neck, leaving bruising marks in his wake. “You’re a possessive little fuck, you know that?”
“I am not!” Izuku protested. Katsuki wasn’t having it though and bit down hard on the juncture between Izuku’s neck and shoulder, earning a surprised yelp from Izuku. Izuku couldn’t help the drawn out moan he made next as Katsuki began sucking another mark into his neck. The noise echoed through the stairwell embarrassingly loud, but Izuku had fallen back into the hazy pleasure leaving him without care.
“Yes you are,” Katsuki nearly purred in his ear, sending a shiver down Izuku’s left side. He nibbled at Izuku’s ear and worked light kisses across his jaw bone until he got back to Izuku’s lips and left his softest kiss yet. “I love it. I can’t get enough of it. I can’t get enough of you. I’m yours Izuku.”
A beat passed between them and Izuku dove back in with full force, Katsuki’s words making his heart swell and the heat in his stomach become a raging inferno. He threw his arms around the blond and kissed him like a man starved, Katsuki returning it with a matched intensity. Both of Katsuki’s hands fell to Izuku’s waist pulling their bodies flush together, the contact making Izuku gasp.
“I’m obsessed with you Kacchan,” Izuku whispered, pulling away for a moment. “You’re all mine.”
Katsuki’s breath caught in his throat. The blond leaned in brushing their noses together, and Izuku could hear the faintest of whimpers come from Katsuki as he silently asked for more. Izuku tilted his head back up and kissed Katsuki slowly.
He took his time savoring the taste of Kacchan. Memorizing Kacchan’s taste, Kacchan’s smell, the way it felt to have Kacchan wrapped in his arms. All of it was his, and he would not soon forget it. His Kacchan.
By instinct Izuku grinded up into Kacchan’s hips that were still being held flush to his, and the blond’s eyes shot open on a gasp followed by a low groan.
“Upstairs. Now,” Kacchan stuttered out with urgency. Izuku pulled him back down into a hurried kiss while pushing Kacchan backwards and out the stairwell door. The elevator arrived immediately and it was now Kacchan’s turn to push Izuku forward. They were incapable of keeping their lips off each other as they rode the elevator up, they moved frantically pushing and pulling at each other with pure lust.
“My Kacchan,” Izuku couldn’t help it. Kacchan buried his head into Izuku’s neck and whined. Izuku took the opening and threaded his fingers into blond locks, giving it a firm tug to pull Kacchan’s eyes back to his. He looked at the blond with more adoration than he ever had before.
“Your Kacchan,” Kacchan sighed, through fluttering lashes and a smile that broke through his lips. Izuku slammed their lips back together and Kacchan didn’t hesitate to grope at Izuku’s ass and lift him into the air, Izuku complying immediately and wrapping his legs around the blond’s waist.
When the doors opened Kacchan carried them across the hall to his room, and Izuku noted through his fog of pleasure that the floor was quiet. It was completely empty for the night.
They slammed the door to Kacchan’s room behind them.