Archive of Our Own ^beta

Chapter Text

It all started with a stupid joke. Class A was weight lifting in the gym, and Bakugou once again exploded something he wasn’t supposed to explode. This time, it was an unfortunately phallic arm pulley on one of the workout machines, which a few of the guys apparently found hilarious. 

“Hey Bakugou, is that what happens when you, ya know…” Kaminari said, making a jerking-off motion with his right hand in case anyone was dense enough to need the hint. 

“Fuck off,” Bakugou responded, though his face was red.

“Chill out, I’m just joking around.”

Katsuki just grumbled and kept on with his workout, but he’d caught a look on Deku’s face; the comment had got the nerd thinking. Never a good thing when you wanted to keep something secret. Lo and behold, for the next couple of days, Izuku seemed to be paying a little too close attention to him. Every time Katsuki used his quirk, Izuku would start muttering. It was never loud enough to make out what he was saying, but Katsuki knew he was talking about him, and it was starting to piss him off.

* * *

Izuku had been thinking about it ever since Kaminari had made that stupid joke in the gym. He still didn’t know everything about Kacchan’s quirk. Could it be that he really couldn’t…?

No, he must be able to. But the more he thought about it, the more he was convinced that Kacchan couldn’t use his hands to do it. He didn’t want to be thinking about it. In fact, he felt guilty every time he caught himself dwelling on the idea. Which was a lot. Especially during training, where sweating was not only unavoidable but actively encouraged. Today, he started thinking about it while watching Kacchan use the pull-up bar. 

It seems that he’s able to keep the sweat from exploding even while touching the pull-up bar. That is, if he’s sweating right now, which he must be; he’s done at least 20 pull-ups already. He could definitely use the sweat to attack if he wanted to, so maybe he just has to concentrate to use it. Or maybe it’s the other way around? What if it gets too built up? He says it’s like nitroglycerin but it can’t be actual nitroglycerin so it might not have all of the same properties. Even if he could—

BOOM!

Izuku was snapped out of his trance by the explosion.

“Damn it Deku!” Kacchan yelled. “Your stupid muttering keeps distracting me!” 

“Sorry!” Izuku yelped and walked away before Kacchan could get angrier. 

So that means he probably has to concentrate on not exploding, or at least that he’s more likely to generate explosions when he’s not paying attention. I guess we knew that he explodes things more often when he’s angry. Well, angrier than his baseline which is already angrier than most people. 

He didn’t realize he’d started talking out loud again until he almost bumped into Kacchan, who was evidently also heading back to the locker rooms. 

“Seriously Deku? Stop muttering about me.” 

“What? I-I’m not!”

“You’re staring at me and you’re muttering about explosions. It doesn’t take a genius to figure it out, genius,” Katsuki said as he flicked Izuku's forehead. 

“Ah, sorry Kacchan! I didn’t mean anything by it, I was just thinking about how your quirk works.” 

“Well stop thinking about it. It’s none of your business.” 

“Right. Okay. Sorry again!” 

As Katsuki walked out of sight, the wheels in Izuku’s head were already turning again.

* * *

Izuku was driving Katsuki insane. Ever since Kaminari’s stupid joke, he’d been muttering non-stop every time he saw Explosion in action. He even said he was thinking about how it worked. If he realized that Dunce Face was right, and that he couldn’t use his hands or else… well, he’d never live it down. He didn’t really think Deku would tell anyone, but just the thought of him knowing… Katsuki couldn’t bear it. He thought back to yesterday’s talk in the locker room. 

“I was just thinking about how your quirk works.” 

Katsuki tried to get the thought out of his head as he walked to class, but it was proving difficult. He was so sure that this had only started after that joke, but why would Deku be thinking about that? Maybe he was just being paranoid. Izuku did love nerding out over quirks. Maybe he really was just trying to figure out the science. 

Katsuki tried to reassure himself all day, but it all fell apart once they got to training. He decided to avoid the pull-up bar, and the arm machine, and basically anything that he would have to grip tightly enough to trap his sweat. That made it harder; when the sweat could fall off him freely there wasn’t any friction, but if it built up and was rubbing against his skin… Well, that was when things started to go kablooey. Literally. 

So he avoided giving Izuku any further evidence for his research, and instead went to the punching bag. This would be good; quick jabs, plus he was wearing gloves. There might be a few small explosions inside of them, but if he was careful, no one would even notice.

He was about five minutes into punching when he started to feel eyes on the back of his head. He sighed, turned around, and caught Izuku face on. He was muttering again. 

Katsuki strode over, walking quickly. He could see the awareness on Izuku’s face when he realized that Katsuki was walking straight towards him. 

“Deku!” Katsuki exclaimed, getting right in his face. “I told you to stop muttering about me!” 

“I’m sorry! I’m not doing it on purpose! Just ever since… I mean, I just never really thought about certain aspects of your quirk and now I’m kinda curious about it.” 

“Like I said already, my quirk is none of your business! Whatever you think you know, forget it, okay?” 

“I don’t know anything! But okay, I’ll try to forget about it.” 

“Good. Now stop watching me before I start punching you instead of the bag.” 

Deku nodded and scampered away to the other side of the gym without another word. Bakugou turned back towards the bag, feeling the small explosions tearing up the insides of his gloves as he started punching with impunity.

* * *

Izuku was almost sure now. Kacchan’s outburst in the gym had confirmed that there were aspects of his quirk that he didn’t want anyone to know about, and Izuku had gotten the impression that he wasn’t just being secretive for no reason. 

“Whatever you think you know, forget it.” 

He couldn’t forget it though. He couldn’t stop thinking about it. He felt bad for Kacchan. No wonder he was so pent up and angry all the time.

Maybe… Maybe he could help Kacchan in some way.

No, no that was weird. What was he going to do, jerk him off himself? 

The thought of it sent a sudden excited jolt through his body. Okay, weird. It almost felt like… No. He liked girls! He really liked girls. They made him feel all fluttery and nervous. Kind of like the feeling he was getting right now, thinking about getting off his oldest friend and rival. But it wasn’t the same. It couldn’t be the same, because Kacchan was a boy, and also Kacchan. Besides, he got fluttery and nervous thinking about being a hero too, or saving people, or when he thought about All Might and how much he admired him. It was a similar enough feeling. That must be it. He just admired Kacchan. He wanted to help him. 

It would definitely still be weird, and the subject seemed almost impossible to approach without getting a face full of fire. Still, he couldn’t get the thought out of his head. He had to try. 

That night, after most of the class had gotten ready for bed and shut their doors, Izuku walked up to Kacchan’s hall and knocked on his door. 

A sleepy looking Kacchan opened it and immediately sighed upon seeing him. 

“What do you want, Deku?” 

“Um. I just wanted to talk for a second. Can I come in?” 

Kacchan glowered at him.

“Fine. Just make it quick.” 

Izuku walked in and shut the door behind him. He stood awkwardly with his back against the door. Kacchan was kind of close to him now that he’d stepped inside and he didn’t really know where to start. He was so nervous. 

“Well? Talk.” 

“So, um, what you were saying earlier. About how I should forget what I know about your quirk? I’ll do my best. And I won’t tell anyone else anything that I know.” 

“Okay…” 

Izuku nodded. “I just… uh. I started thinking about it after Kaminari’s joke the other day.”

Bakugou froze. Midoriya decided to get to the point quickly before Kacchan could explode on him.

“It’s true, isn’t it? What he said. I mean, he was just being an idiot, but…” 

“If you… if you tell anyone,” Kacchan was reddening, and his hair was starting to stand on end even more than usual.

“I won’t! I won’t say anything, and I won’t bring it up again, but—” 

“But what, Deku?” Kacchan said, like he was daring him to say something about it. 

Izuku’s voice dropped so quiet, it was almost imperceptible when he said, “I could help.” 

He expected Kacchan to scream at him, to call him names, to tell him to fuck off. Instead he just said, in a voice almost as quiet as Izuku’s own, “What?”

“I could help,” Izuku said again, louder this time.

“How could you help?” Kacchan’s voice was strained. 

“I could… you know. Help. If you wanted. I mean, I know it’s a really weird idea but if you wanted, or needed—” 

“What the hell? I don’t need anything from you, Deku!” 

“Okay! Okay, just forget I said anything. Sorry!” 

“Whatever, just… get out.” 

“Okay.” 

Izuku walked over to the door, but he paused just before leaving. Without looking at Kacchan, he said, “If you change your mind, let me know!” As quickly as possible, he shut the door. 

* * *

Katsuki couldn’t get to sleep after Deku left. He couldn’t stop thinking about that idiot’s suggestion. Why would he say that? Why would he offer that? He kept turning it over and over in his mind. Worse, he started thinking about actually taking him up on the offer. Once he started on that, it was all he could think about, and he couldn’t even jerk off about it because that stupid idiot was right, goddammit. Why did he have to be so smart? 

And why would he offer to help him? He surely wasn’t that selfless. Giving handjobs wasn’t typically part of hero duty, unless the pros were really holding out on what they shared with the class. Was it possible that he just… wanted to? 

No. And even if he did, Deku was an idiot. That didn’t change just because Katsuki had… well, complicated feelings about him. He might have a crush. Maybe. It was a new development. Whatever. He just figured he had bad taste or some sort of complex. Or maybe Deku getting strong enough to beat him in a fight half the time was a turn on. Whatever. That was all beside the point. He couldn’t let Deku do…that. It was humiliating. And it would mean admitting that he couldn’t do it himself. He couldn’t go through with it, even if it was the most appealing idea he’d possibly ever heard. Even if he couldn’t stop thinking about it. 

He let out a frustrated groan as he turned over on his side and tried to get to sleep. 

The next day wasn’t much better. Not only was he frustrated, angry, and filled with pent up energy that he couldn’t release, but now he was also tired. It honestly helped a bit with the pent up frustration, but between everything else he found concentrating on school next to impossible.

After another few days passed by the same way, he almost couldn’t bear it. He was so pissed at Deku for doing this to him. He’d spent years of his adolescence managing to ignore the need to satiate himself. He could control it, push it down, and if he exploded a few more things than usual, well, everyone could just deal with it. But ever since Deku had come to his room with that offer… nothing was working anymore. He was constantly horny and frustrated, and all he wanted was just a little relief. 

A week after Izuku had approached him, after saying he was going to bed early and then trying and failing to get off hands free for over an hour, he finally relented. He started walking without thinking to Izuku’s room and knocked on the door. Izuku’s shocked face when he answered was almost enough to make Katsuki turn around and leave rather than face the embarrassment of what he was about to do. 

“Kacchan! Hi. Uh, come in.” 

Izuku moved aside quickly and, with a slight hesitation, Bakugou followed and shut the door. 

“So… what’s up?” Izuku asked. He was obviously nervous. 

Bakugou couldn’t look him in the eye. “I thought about what you said,” he said. Then he swallowed. Took a deep breath. “Is… is your offer still on the table?” 

He chanced a glance at Deku, who looked like he’d just gotten smacked on the head. 

“What? I mean, yeah! It– yes. Yes it is.” 

“Okay. I want to take you up on it. But I have a question first.” 

“Sure! Yeah, anything. What is it?” 

Katsuki looked at him for the first time since entering the room. Izuku’s eyes were wide, his pupils full. “Why?” 

“Oh.” Izuku still looked like he was in a state of shock, which was mostly how Bakugou felt. “Um. Honestly? I don’t really know. I just… I thought of it, and then I couldn't stop thinking about it. So I offered.” 

Bakugou nodded. Then, slowly, he walked towards the bed and sat down on it. Izuku shook his head as if to clear it, then followed. He sat down gingerly next to Katsuki.

“Um. So, how do you want to start?”

“I don’t know, this was your idea!”

“Okay! Um. Are you… ready?” 

Katsuki could feel his ears burning. All week he’d been horny, but of course now his dick wouldn’t get hard. He felt like he was in some sort of fugue state. He still couldn’t believe he was here, in Deku’s room, doing this.

“Not yet. Like you said, I… I don’t fuckin’ do this by myself.” 

“It’s okay.” Izuku sounded so sincere. So helpful. God. If Katsuki wasn't so goddamn horny he’d walk right out of the room. “Um… well, maybe… think about girls.” 

“Right. Girls,” Katsuki scoffed.

He thought about them. Didn’t help. He’d already known that much, but he had to think about something. He turned his head to the side and caught a glimpse of one of Deku’s All Might posters. It was hard to not look at All Might in this room, honestly. He was everywhere. He wasn’t sure if it was helping or not. He did know that he felt kind of fucking crazy. Then, he felt Izuku lay a hand on his thigh. Softly, hesitantly, he started trailing it up and down, getting closer to his crotch on each pass. Katsuki let out a tiny, involuntary moan and felt his blood start to rush south. 

“I’m ready.” 

The hand moved straight towards his crotch without hesitation once he said it, like Deku had been waiting for it. He cupped him in his hand over his shorts, then, slowly, started rubbing. 

It was clumsy at first, like he knew the general idea but wasn’t used to the size or shape. Well, Katsuki supposed, he probably wasn’t. After a minute or so, Deku’s hand started moving towards his waistband, and slipped in under his shorts and his underwear. 

Katsuki gasped louder than he thought possible when he felt Izuku’s hand on his cock. He couldn’t help it. It felt so, so good to finally have someone touch it. He started stroking, and Katsuki put his head back against the wall and moaned. He could tell he wasn’t going to last long. It all felt too intense. 

After a few minutes, he reached for his waistband and pulled it down to free himself from the constraints of clothes. His dick, fully hard now, sprung free and bobbed against his stomach. He heard Izuku gasp, and chanced a glance at his friend for the first time since they had started. He was staring at Katsuki’s cock, wide-eyed and open-mouthed as he watched it thrust up into his hand.

The sight of him like that was too much. Bakugou shut his eyes and let out a final groan as he felt the wave of his orgasm crash over him, sparks flying from his hands.

He didn’t know how long he sat there panting before opening his eyes. When he did, Izuku was still staring, and still holding his cock. He quickly let go and stood up once he came to his senses, but not before Katsuki caught a glimpse of the tent he was pitching. He caught Izuku’s eye and realized he’d noticed him looking. They stared at one another for a long few seconds, until Katsuki became abruptly aware that he still had his dick out, and went to clean up and put it away. Deku turned away while he was doing so. Neither of them seemed to know where to look. 

“Okay, well, um. Night,” Bakugou said as he went to leave. “I um… that was… that helped.”

“Oh! I-I’m glad. Goodnight Kacchan.” 

Bakugou nodded, then left and shut the door. 

* * *

Izuku could barely wait until Kacchan had left before he was back on the bed, pulling out his own dick. Some of Kacchan’s cum was still on his hand, and he couldn’t stop staring at it as he tugged at himself. It didn’t take long before he was coming himself, moaning Kacchan’s name.

Once he was finished, he looked down at the mess that was now all over his hand and stomach, and felt a deep sense of shame wash over him. He was supposed to be helping Kacchan, not getting off from it. And he liked girls! And Kacchan wasn’t a girl, no matter how pretty of a face he had. 

Izuku cleaned himself up as quickly as he could, face burning, and then laid down in bed to think. There were so many thoughts running through his brain that he couldn’t make sense of them. Not that he was unfamiliar with that sensation, but it was particularly bad right now, coupled with the awful feeling of guilt and confusion in the pit of his stomach. He didn’t fall asleep for a long time. When he finally did, it was in the early hours of the morning as he unwittingly imagined what Kacchan’s lips would feel like on his. 

Waking up for class the next day was difficult, to say the least. Not only was he dead tired, but class meant facing Kacchan, and he really wasn’t sure that he could. He was half convinced that the boy would just explode him on the spot. When he reluctantly walked into class, however, Katsuki simply met his gaze before looking away quickly. Izuku walked to his seat behind him and then, to his absolute shock, Kacchan turned his head a bit and said, “Morning, Izuku.”

Izuku yelped. Like, actually yelped. Embarrassing. 

“Oh! M-Morning, Kacchan!” 

Then Mr. Aizawa walked in, and class started, and they were spared from talking any longer. Midoriya was not, however, spared from having to stare at the back of Katsuki’s head all day. Oh well. He’d always kind of liked staring at Kacchan, anyways. 

Chapter Text

They didn’t talk about it. In fact, they barely interacted outside of class for days. Kacchan hadn’t said anything, and he hadn’t come to Izuku’s room again, and Izuku didn’t think he could handle being the one to bring it up. He did notice that Kacchan seemed… well, maybe not calmer but certainly less angry than usual. The only real problem was that Izuku couldn’t stop thinking about his dick, or the way his face looked when he came. But that was Izuku’s problem, and he was dealing with it by resolutely not thinking about it. 

He also hadn’t jerked off since the incident, because whenever he tried all he could see was Kacchan. He had tried thinking about girls like he normally did; about bouncing boobs and soft thighs peeking out of skirts. He even thought about specific girls in their class, which he usually didn’t do because it made him feel like a creep. But as soon as he got going, whatever images he conjured would be replaced by Kacchan’s face contorted in pleasure, or Kacchan’s biceps bulging out of his hero costume, or his chest heaving as he breathed heavily, sweat dripping down his body after a fight. Sometimes the images would start to combine with the girls inside of his mind, which was just confusing to say the least. Now he was not only horny, but also thinking about how Mina and Kacchan’s quirks would combine if they had a baby, or possibly morphed into one person, and he really had to do something else or he was going to lose it.

So he didn’t jerk off and he tried his best not to think about Kacchan and he was getting very, very frustrated. He didn’t know how Kacchan did this all the time. This not jerking off thing. It was making him insane. At least he was starting to understand him better; it had only been a few days and he was already ready to explode. He couldn’t imagine what it would be like if he actually had the power to do it.

After a few more days, Izuku was just about ready to give in. Still, it scared him. He’d thought that if he waited long enough, the thoughts of Kacchan would dissipate and he could go back to jerking off over boobs like he’d always done and everything would be fine. But it seemed that the longer he went, the more he couldn’t think about anything else other than Kacchan. And sure, he’d jerked off after the first time. But that was normal! They were doing sexual things so it was natural to get horny and need relief. But if he started thinking about Kacchan like that all the time… well, he didn’t know what that would mean and he didn’t want to think about it. He admired Kacchan, that was all. He was helping him! That was all it was!

Another few days passed. Izuku lay awake, half hard and trying not to do anything about it, when he heard a knock at his door.

* * *

Katsuki didn’t know what he was thinking. He didn’t know why he was here again. Sure, he’d let Deku “help” him. Sure, it had been great. He wasn’t sure he’d ever felt such relief. But to do it again? It couldn’t become a pattern, and he definitely didn’t want to owe Deku anything. But he was getting frustrated again, and he couldn’t stop thinking about how good it had felt, and before he knew it he was standing in front of Deku’s door at 10pm and softly knocking, not sure if he wanted him to answer it or not. 

Now the door was opening and Deku was standing there, staring at him. His face was a little flushed and his lips were red and chapped and Katsuki was really, really trying not to look down. 

“Um. Hi, Kacchan!” 

He didn’t respond.

“Do you… want to come in?” 

He nodded. Izuku stood aside to make room, and Katsuki entered. Izuku quickly shut the door behind him. 

He could tell that Izuku was waiting for him to say something. He knew why he was here. He had to. They had to both be thinking about it, right?

“Kacchan?” Katsuki’s eyes snapped up at the sound of the nickname. “Did you… um. I mean. Do you… Are you here… I mean I don’t want to assume why you’re here, but are you here for, um….” 

“Shut up.” 

“O-Okay.” 

Katsuki took a deep breath and steeled himself. 

“Look, I… I don’t want to owe you anything.” 

“You don’t! I mean, I was happy to help. I can… I mean if you want to, again, that’s totally fine. I… I don’t mind, Kacchan.” 

Katsuki swallowed hard. “Yeah, well. I don’t wanna owe you anything. So…”

He racked his brain. There had to be something. Something he could do…. 

“So, you’re behind in math, right?” 

“Huh?” Izuku looked up at him, confused, with those big green eyes. 

“I said you’re behind in math, right?” 

“Well, yeah, a little. The latest stuff has been confusing me.”

“I’ll tutor you.” It was out of Katsuki’s mouth before he had a chance to really think about it. This was good, though. Yeah. This could work. “I get the new stuff no problem. So, I can tutor you, and then in exchange you could… I mean if you’re okay with it.”

If Katsuki didn’t know better, he’d swear that Izuku’s eyes lit up. 

“Oh! Okay! I mean, yeah. Yeah, that’s a good idea. I could really use your help, Kacchan.”

“Tch. ‘Course you could, nerd. Can’t even do basic calculus.”

They were silent for a moment, both looking anywhere but at each other. 

“Well, I think I’m too tired for math right now,” Izuku said. “But maybe… we could get together tomorrow after class for that, and umm… well, maybe right now I could… do my part of the deal?” 

Katsuki sucked a breath and chanced a look at Izuku. He was… well, he actually didn’t seem very put off by the situation. He almost looked… eager.

Katsuki nodded, and moved to sit down on the bed. 

Getting started wasn’t as difficult this time. He was still nervous, but he was feeling calmer because of the deal. Besides, he was fucking wound up. He’d been thinking about this nonstop ever since the first time.

It seemed like he wasn’t the only one. Izuku had sat down next to him and was already breathing harder than normal. He put a tentative hand on Katsuki’s upper thigh and asked, “Can I?” 

Katsuki nodded. He was half hard already. Izuku’s hand drifted up towards his crotch and palmed him through his sweatpants. He could feel himself grow harder under the touch. Izuku kept it up for a little while. He seemed almost entranced, staring at the way Katsuki’s bulge filled out under the rough movements of his hand. A quick glance downwards confirmed that he was hard too. Katsuki didn’t even notice the tiny moans coming from his own mouth. 

“Kacchan… Can I take them off?” 

The second that Katsuki nodded to give the go ahead Izuku was pulling at the waistband of the sweatpants he was wearing. He heard a sharp intake of breath and a soft, “oh, fuck,” from Izuku. He rarely heard the nerd swear. Shit, that was hot. He quickly realized why he was surprised; Katsuki wasn’t wearing any underwear. Now his dick was out, hard and angry and resting on his thigh. Before he could start to feel self-conscious, Izuku’s hand was back on him.

He was moving quickly. A little too quickly. Katsuki grunted out in discomfort and Izuku paused.
“What—What’s wrong? Am I… Is it not good?” Izuku asked, sounding so unsure that Katsuki wanted to smack him. Or maybe fucking kiss him or something. He wasn’t sure. 

“It’s fine, nerd. It’s just… it’s a little dry. Hurts.”

“Oh! Right, I’m sorry.” 

Sorry. Katsuki couldn’t believe Deku was actually apologizing for giving him a handjob. Fuckin’ hell. 

Then, before Katsuki could register what was even happening, Deku was leaning over his dick, his mouth just inches from it, as he spit directly on it. Katsuki watched as the glob of spit landed on the side and started to slowly slide down. He watched as Izuku rubbed his hand over it, spreading it out before passing over his slit and collecting the precum there too and then rubbing up and down and up and down and oh god, he was not going to last. 

Katsuki could barely register his breath coming out in pants. Deku pulled particularly hard as he passed over his tip and he whined, a sound that he hardly even recognized as his own voice. 

“Fuck, Deku… Just like that.” 

Izuku nodded and panted as he continued pumping Katsuki’s cock. Katsuki couldn’t help but look down at Izuku’s crotch again. He was straining against his shorts and there was definitely a wet patch there. Fuck. He wasn’t sure if it made him more or less crazy that Deku was clearly getting off on this too. 

“Deku, I’m close,” he gasped. 

“Kacchan… Does it feel good Kacchan?” 

“Yes, fuck, yeah it feels good. Feels good Deku. I’m– hah– I’m gonna come.” 

“Please… Please Kacchan, please come for me, please…” 

“Deku, fuck!” Katsuki shouted as he came, spurting all over Izuku’s hand.

As he wound down from the orgasm and came to his senses, he vaguely registered Deku squirming and panting and pressing his own thighs together. He didn’t know what possessed him to say it besides still being in a post orgasmic bliss, but before he knew it the words “touch yourself,” were coming out of his mouth.

Then Deku was pushing the hand covered in Katsuki’s cum down his own shorts and his eyes were rolling back in his head as he moaned, reaching his own climax. Katsuki stared in awe. So that’s what Izuku looks like when he comes, he found himself thinking, along with, I wish I could see his dick. 

Jesus fucking christ.

The orgasm high was fading and now the panic was rising and Katsuki had to get the fuck out of there. He stood up, tucked himself back into his sweatpants, and started to bolt. Izuku didn’t say a thing. Just before he opened the door, Katsuki paused. He stared at the doorknob. 

“Meet me after class tomorrow for math tutoring. Don’t be late.” 

Then he left the room, shutting the door behind him and all but running back to the safety of his dorm, wondering what the hell just happened. 

The next day, Katsuki decided to be normal. Just like the first time. It was fine. Everything was normal. He walked into class, heart pounding, and sat down at his desk. When Deku showed up, they locked eyes. Katsuki didn’t look away, because he wasn’t a fucking coward. What he didn’t expect was for Izuku to do the same. They just stared at each other the entire time Izuku walked over to his desk.

“M-Morning Kacchan,” Izuku said, still not breaking eye contact. 

Katsuki nodded. “Morning, Deku.” 

Then Izuku sat in his seat, and they ignored each other for the rest of the day. See, normal.

* * *

Izuku didn’t really know what to expect from this tutoring session. Last night had been… intense. He couldn’t believe he’d touched himself in front of Kacchan. He especially couldn’t believe that Kacchan had asked him to. 

Kacchan hadn't told Izuku where to meet him, so he went to the common room, figuring that was a safe bet. He didn't think that being alone in either of their rooms was a great idea right now. Luckily it seemed that was the right call; Kacchan walked into the room and sat down at Izuku's table about 10 minutes after he arrived. 

"Hey, nerd."

"Hi, Kacchan!"

"You better be ready to pay attention." 

"Of course Kacchan! I always pay attention to you!" 

Katsuki shuddered at that, but Izuku didn't notice, already pulling out his math notebook. He was going to be the best student ever. 

Two hours later, Izuku had had enough of derivatives and integrals for a lifetime. He thought he was improving, though he did keep getting distracted by his tutor. By the way his lips moved when he talked, the way his eyes narrowed when he looked over Izuku’s work, the way the veins in his hands popped when he angrily pointed at something Izuku did wrong. 

By the end of the two hours, Izuku’s attention span was hanging on by a thread. Luckily, Kacchan didn’t seem to be mad about it today. After Izuku stared at his lips for just a little too long, he asked to call it a night. 

“Sure, Kacchan,” Izuku replied. “Umm… Well, I guess I’ll see you tomorrow then.” 

“Right.” 

“Unless… I mean you were tutoring me for a while. If you want me to, you know, umm… I mean, you’ve spent more time at this point so it’s really only fair for me to hold up my end of the bargain…” Izuku swallowed hard as he trailed off. 

“Okay.” 

“Okay?” 

“Yeah. My room, 5 minutes. Don’t let anybody see you.”

“Of course, Kacchan!”

Izuku gathered up his things as quickly as he could, then had 4 minutes and 45 seconds to kill after Katsuki left. He paced, got a drink, stared out the window, then checked the time and realized he was 2 minutes late. He ran up to the fourth floor as fast as he could and knocked on Bakugou’s door. Before he could register what was happening, the door opened and he was being pulled in. 

“You’re late,” Bakugou said angrily.

“I’m sorry Kacchan.”

“Tch. Whatever.” 

Katsuki sat down on his bed and stared expectantly at Izuku. He quickly rushed over and sat next to Kacchan. 

Izuku softly rested a hand on Kacchan’s thigh and started rubbing circles. 

“Can I touch you?” 

“That’s what you’re here for, ain’t it?” Kacchan replied grumpily. Izuku took that as a yes and moved his hand up to Kacchan’s growing bulge. He grabbed it through his sweats and rubbed, trying to feel the shape of it. He loved this part of the ritual. It felt really good in his hand. 

Kacchan gasped, then quickly shut his mouth as if he hadn’t meant to do it. 

“Can I take your pants off Kacchan?”

Kacchan nodded swiftly, and Izuku reached up to the waistband and pulled. He groaned out loud at the sight. Kacchan wasn’t wearing underwear again today and his dick was almost fully hard already. Izuku kind of wanted to put it in his mouth. 

Oh god, that was… Okay, nope! Nope. He shook his head to clear it of the thought. He was just here to help Kacchan! He wasn’t… The sexual feelings were just because they were doing sexual things! He couldn’t… Oh god. Kacchan’s dick twitched, and he thought about how it would feel on his tongue. Fuck. He shook his head again and willed himself to focus. He took a deep breath, then redoubled his efforts in jerking off his childhood friend. 

“That’s good, Deku,” Katsuki said softly.

“I’m glad, Kacchan.” Izuku said through heavy breaths. “Kacchan looks really good like this,” he mumbled without thinking.

“Fuuuuck,” Katsuki moaned, bucking up into Izuku’s hand. “Fuck… talk… talk more.”

“Wha–” Izuku started, confused.

“You fuckin’... you mumble all the time anyways idiot, just say that shit louder,” Katsuki said, his face bright red. 

Izuku gaped at him for a moment. Kacchan wanted him to what, talk dirty to him? Okay. This was fine! Whatever! He could do it. He could do it for Kacchan. He could do anything for Kacchan.

“Okay. Umm… Sorry, I mean… You’re just really… God. You’re really good looking, Kacchan.” 

Katsuki groaned. 

Izuku wasn’t sure where this was coming from, or if he was doing it right at all. Still, he continued.

“You’re so smart, tutoring me in math. I understand it way better from you than from our teachers. I need you… need you there to show me how to do it right.” 

Kacchan’s groans were getting louder and it was making Izuku bolder, more confident. 

“You’re so strong too… You’re just really good at everything Kacchan. You’re so amazing.” 

“Fuck, that’s it Izuku. Feels so good,” Katsuki panted. 

It was Izuku’s turn to moan. The sound jolted him out of whatever trance he’d been in and he quickly realized he’d been shamelessly humping Kacchan’s leg. He stopped and moved to get off of it, but Kacchan held him in place. 

“No… keep going Deku, fuck… Love seeing you get off on me… Fuck, I’m so close…”

As Izuku stared in awe, he got an idea. A brilliant, stupid idea. He reached up with his unoccupied hand and pinched Kacchan’s nipple through his tank top. 

The effect was instantaneous; Kacchan came with a wail, hands clutching at the bedsheets as he shot off ropes of cum onto Izuku’s hand. 

Izuku groaned as he watched. He was so close, rubbing up against Kacchan’s knee like a horny fucking dog. 

He didn’t wait for Kacchan to ask this time, and he didn’t bother with whatever stupid sense of propriety he had been trying to maintain. He pulled his dick out and watched Kacchan’s eyes go wide at the sight. He tugged himself off with the cum covered hand and came with a groan as he watched Kacchan watching him. 

They didn’t move as quickly in the aftermath this time. Katsuki grabbed a tissue and offered the box to Izuku, who accepted. They cleaned off. They avoided eye contact. They both winced at the scorch marks on the sheets. Then Izuku pulled his underwear and shorts back up and headed towards the door. 

“Goodnight Kacchan,” he said with a quick, nervous glance back. 

Katsuki was only looking at him with a dazed expression on his face. He shook his head as he caught Izuku’s eye and his face went back to neutral. 

“Night, Izuku.” 

Izuku shut the door behind him. 

Izuku returned to his room, quickly washed his hands and… other parts, then collapsed face first on his bed. 

So, maybe he was attracted to Kacchan. Okay, fine. He was definitely attracted to Kacchan. The second he allowed himself to think about it, it actually made an insane amount of sense. He’d always admired him. He’d always chased after him. He’d always thought he was insanely good looking, though he’d assumed that was another piece of admiration. Maybe… Well, maybe it wasn’t just admiration.

He groaned into his pillow. Did this mean he liked guys? Maybe it was just Kacchan. He ran through a list of the top pro heroes in his head. Endeavor? Ew. Nope, not into that. Jeanist? Izuku contemplated for a minute. He was a great pro and definitely cool, but he didn’t make him hot or bothered in the way that Kacchan had, or the way that thinking about some of the female pros did. Okay. Hawks? Izuku thought about it. He groaned into his pillow. Okay. It wasn’t just Kacchan. 

This was fine! So, maybe he was bi. Whatever. He could work with that. But the Kacchan thing… It just seemed unsustainable. How long was this going to go on, anyways? Until Kacchan figured out a way to jerk himself off? Until Izuku got better at math?

He kept thinking about different scenarios, most of them ending with either Kacchan exploding him or them furiously making out, until he finally passed out on top of the covers, his face red and his desk lamp on.