Work Text:
Katsuki was bored, which was quite a depressing thing to think when he had a dick up his ass.
Below him, the guy was completely gone, moaning with his face scrunched up in an unattractive way. The hands he had wrapped around Katsuki’s hips were useless, barely holding tight enough for him to feel the weight of them. Katsuki was severely regretting switching to riding, but giving this extra the reins had done nothing but make him soft.
Not that he was exactly hard right now. He looked down at his bouncing dick, not so much as flushed. It was as disinterested as he was, any hardness coming more from a physiological reaction than any actual pleasure.
He groaned, and rolled his eyes when the guy moaned even louder in response. As if he genuinely believed Katsuki was feeling as good as him right now.
In retrospect, he had known damn well this was a bad idea.
He had never been the type to hook up.
His sole sexual experience came from a very casual friends with benefits situation with another sidekick from Best Jeanist’s agency. He had been in desperate need of any distraction from his awful breakup, and Katsuki had been curious about sex – and also a bit pissed about knowing Izuku had lost his virginity a few months prior.
It hadn’t lasted very long, and even as a virgin, Katsuki had known it wasn’t mind-blowing sex. Still, it had been good enough, and assuaged any carnal need for a good few years.
Tonight, though, Katsuki had been in a club, alone in a booth as his friends got shitfaced, quite in a bad mood, and missing his stupid roommate.
Izuku had been ridiculously busy since he decided to take on both his teacher and hero duties, like the idiot he was. It was a miracle to catch a glimpse of him, and even when he did, Izuku was always rushing off to some place. He had the decency to look upset about it, but it wasn’t enough to calm the storm building up in Katsuki’s head.
So when that guy had slipped beside him and started chatting him up, green eyed and decently built, Katsuki had thrown caution to the wind.
Good enough, he had thought before bringing him back to his empty apartment.
He was sorely wrong. There was nothing good enough about this fucker. His muscles were for show, his closed eyes took away his only redeeming quality and his dick work was shit.
That’s what he got for being pathetic enough to look for some lookalike.
Closing his eyes, he imagined Izuku below him instead. He wasn’t proud of how often he thought of Izuku during his self-care moments. He always felt like the worst pervert for daring to think about his oblivious best friend with his hand pumping in and out of him, imagining his fingers as something else. Every time he was done, he would swear it was the last time – it never was.
Right now, though, even while clear-minded, he was too done to care. He just wanted to come and put an end to this.
Ignoring the strain in his legs, he lost himself in his mind.
First things first, Izuku’s grip would never be that weak. He was intense in everything he did, making sure to leave traces wherever he went. Katsuki could perfectly imagine those wide, scarred hands digging hard enough into his skin to bruise, mark his passage, his territory.
Izuku’s strength had never been for show either. Katsuki could vividly remember the fucker casually lifting a piece of furniture to pick up his lost pen, as if Katsuki hadn’t needed Eijirou’s help to move it one room over.
No, eager-to-please Izuku wouldn’t allow Katsuki to do all the damn work. He would put those rock hard muscles to use and have Katsuki bouncing on his cock like a ragdoll, lifting his own hips to hit even deeper. His perfectionism would have him hit his prostate every single time too.
Izuku would overwhelm him with pleasure until Katsuki could do nothing but let him take control.
And he knew how fucking good Izuku was at being in control. Whenever they were together on the field, Katsuki barely ever bothered with strategizing. He listened to Izuku’s steady, authoritative voice in his in-piece and acted.
He had tried to go against Izuku’s word a single time, and the look he had gotten had fueled his jerk-off material for months.
If Izuku was below him right now, Katsuki wouldn’t even be able to string two words together, much less fantasize about how good he wanted to be fucked.
If Izuku was here, he wouldn’t allow Katsuki to see, to think, to feel anything other than him and the cock pumping in and out of him.
If Izuku was here–
Behind his eyelids, the room got infinitesimally darker.
Eyes flying open, his gaze jerked towards the doorway and all the air immediately left his lungs.
Izuku was here.
Standing in the doorway, arms crossed and eyes riveted on Katsuki. He was still in his suit, though he had shredded off his vest and pulled up his sleeves. His hair was tousled from flying around all day, falling just a little over his eyes and darkening them that much further.
His face was unreadable. No shock, no embarrassment, no disgust. Hell, he didn’t even blink when Katsuki’s eyes met his. If anything, he cocked his head to the side, then glanced down at the guy still moaning loud enough to make the walls shake.
When he looked back up, his lips had curled up in a way Katsuki had never seen before. There was none of the good-naturedness of Izuku’s usual smile, nothing kind or cheerful about it.
It was mocking. It was cocky. It was mean.
Katsuki barely had time to process it before a hand wrapped around his dick and he saw white.
His orgasm hit him like a tsunami, wiping out any and all thought beyond a single name. He had never experienced pleasure like that, something that made his body feel liquid and his mind foggy.
By the time he surfaced, he had one hand splayed on a sweaty chest, his shaky arm barely holding up his weight. Below him, the guy was breathing like he had run a marathon.
Further away, Izuku was still smiling, though there was a glint in his eye that made a shiver run up Katsuki’s spine.
Before he could even think about how to handle this situation, Izuku hummed. “It’s late, Kacchan. You should see your friend out.”
Katsuki was still too dazed to do little more than stare, but the guy jostled hard enough to dislodge him. Katsuki went with the movement, letting himself slip to the side as the guy – fuck, Katsuki was only now realizing he hadn’t bothered with his name – jumped on his feet, swiveling around to see Izuku now casually leaning against the counter.
“What the actual– Fuck, I’m so sorry! We thought there was no one, I– Wait, you are Deku?”
“And you are a stranger in my home at,” Izuku made a show of looking at his watch, “one twenty-five in the morning.” Dropping his arm back, he looked at the gaping guy, smile gone. “Out.”
To his credit, the guy didn’t have to be told twice. Jumping five feet into the air, he babbled apology after apology as he rushed to gather his clothes. He barely put on little more than his pants before he was out of the door, squeaking out one last ‘So sorry, Deku, sir!’
The sound of the door slamming close echoed in the silence for a while.
Then, smiling in a downright dangerous way, Izuku quietly said, “I’m home.”
Katsuki’s breath hitched. Hearing those overly familiar words spoken in that low, unreadable tone had his dick finally grow interested.
His bare dick that was on full display from how he was splayed on the couch. For a moment, he thought about at least throwing on his boxers. Then he remembered that Izuku had watched him get fucked minutes ago, and getting dressed was the least of his problems when Izuku was watching like that.
“You’re late,” he finally croaked out, nearly laughing at how absurd the words were in their current situation.
Izuku hummed. “I had to rush back to UA to deal with a leak related to the exams happening next week. I do remember texting you about it and not getting a response.” His eyes flickered down to the condom wrapping and lube haphazardly thrown on the ground. “I see now that you were busy.”
Brain finally kickstarted back into action, Katsuki’s eyes narrowed. “You know, normal people tend to leave when they see people fucking, and not stand there and stare like a creep.”
“I would agree with that if the fucking was happening anywhere other than my apartment.”
“Our apartment, shitstain, I pay that damn rent too.”
“And that makes you the owner of a very nice room just down the hall,” Izuku said, pointing at said hall. Katsuki wanted to flip him off, but he still felt boneless.
He settled on huffing. “I didn’t want him in my room.”
Something in Izuku’s gaze went sharp. “And why is that?”
Katsuki realized too late how he didn’t actually want to say the reason behind that. He scowled. “None of your goddamn business. I bought this couch, I can do whatever I want on it.”
“The same couch we sit on every day?”
Katsuki couldn’t have swallowed back the anger that surged in him even if he wanted to. “Well, there hasn’t been much of that recently, has there?”
There was a beat of silence, and Katsuki looked away the moment Izuku’s face softened. He didn’t look up again even when soft footsteps drew closer and a shadow fell over him.
“Kacchan, look at me.”
“Fuck you.”
“Right after someone fucked you? You are insatiable.”
Katsuki choked on air at the wording. Red blooming on his cheeks, he snapped his head up to glare at Izuku, scandalized.
Izuku had the audacity to look unimpressed. “Are you sincerely outraged by that when I had to watch you have terrible sex not even five minutes ago?”
Face reddening even further, Katsuki crossed his arms and glared off into the distance, feeling petty. “Fuck off, it wasn’t terrible sex.”
“Oh really?” And here was the tone to match Izuku’s earlier smile. Amused, but just on the edge of condescending. Katsuki peered at him, heat pooling in groin at the way Izuku was looking down on him, still in his suit and eyes dark. They had seemed unreadable earlier, but up close, Katsuki was pretty sure he could read hunger in them.
Anticipation made his heart beat that much faster.
“If it was such an amazing fuck, why did you look so bored? That is, until you saw me, of course." Leaning down until their faces were inches apart, Izuku softly asked, "Tell me, Kacchan, what were you thinking about that suddenly got you all hard at the end?”
Katsuki clenched his jaw, glaring at the knowing look on Izuku’s face, the cocky way he leaned closer, putting them at face level.
He knew. The bastard knew damn well what Katsuki had been thinking about. He must have guessed the instant the guy jumped off the couch and revealed green eyes, hard muscles and the same height.
Katsuki could try to deny it. He could simply admit that the sex was terrible, that he had been thinking about the most random things. For the better part of it, that’s what he had been doing, after all.
But it was one in the morning, he had felt neglected for the whole week, and his dick was filling out again. He had already made so many bad decisions, what was one more.
Meeting Izuku’s gaze head-on, Katsuki fell back against the couch. “I was thinking about how a stupid nerd like you would probably do even worse than that extra.”
Katsuki just had the time to catch the way Izuku’s eyes turned dark, before the world suddenly spun around him. His face met the fabric of the couch, hips lifted up by way too familiar hands that forced his back into an arch.
When Katsuki tried to lift himself up, Izuku’s voice cut through the air like a clap of thunder.
“Down. You move when I tell you to.”
It was the same voice he used on the field. Quiet, hard, unyielding. A voice that commanded respect, a voice that didn’t allow any protest. Katsuki’s muscles locked into place before he even realized, his obedience torn out of him like a well-kept secret only Izuku had the key to access.
When he stayed still, Izuku hummed approvingly. “Good boy.”
Katsuki’s breaths quickened until he was panting when rough hands explored his skin, kneading his ass and pinching at the inside of his thighs. He whined.
“Didn’t leave so much as a mark,” Izuku mused, spending a moment to massage Katsuki’s hips. “Not that I’m complaining, but did he even try to make you feel good? My Kacchan needs to be roughened up a bit, don’t you?”
When Katsuki opened his mouth to respond – to say what, he would never know – there was a slapping sound, quickly followed by a sting on his left ass cheek. He shouted, precum leaking out of his rock hard dick.
“Is that what I have to expect every time I get busy, Kacchan?” Izuku asked, voice nearing on scolding. There was a popping sound, followed by a finger prodding his entrance. “I don’t give you attention for a few days so I have to come home to you with a pathetic dick up your ass? You would have never so much as gotten hard if I hadn’t been there.”
Another slap, another shout. Katsuki’s mind clouded over, mouth filling with saliva he didn’t bother to swallow.
Without any warning, Izuku plunged three fingers inside, curling them immediately. Katsuki’s eyes rolled to the back of his head, Izuku’s ‘tsk’ a distant thing compared to the relief of finally getting what he wanted, what he needed.
“Couldn’t even do the job of prepping you for me,” Izuku said, annoyance thick in his voice. “No wonder you were so bored, you couldn’t even feel him. You know you need a thick cock to fill you, Kacchan, you have the hole of someone who was ran through.”
Katsuki choked, humiliation rising in him and lighting up all his nerves. He could feel his whole body flush when his cock jumped, spraying more precum on the couch.
Izuku laughed, amused and mean, then started scissoring him open without any gentleness. Katsuki cried out and immediately started shaking, still a bit sensitive from his earlier orgasm. The burn of being so abruptly opened made tears rise to his eyes, the crude treatment making him feel like nothing more than a sex toy Izuku was going to use to relieve the stress of the day.
He wished he wasn’t as turned on by it as he was.
Izuku didn’t waste any time teasing. As soon as he was loose enough, he retracted his finger and spanked Katsuki again when he whined at the loss.
“Patience, Kacchan. Unlike you, I wasn’t naked like a whore ready for the taking.” Then, just as the sound of a zipper filled the silence, Izuku chuckled. “I wonder, did you even play hard to get when he came up to you? I bet you didn’t. I bet you spread your legs as soon as you saw green eyes. You are so desperate for me, after all.”
Katsuki hid his face in the couch, muffling his sob as his mind grew even hazier.
The truth was, Izuku was right. Katsuki hadn’t even bothered letting the guy try his shitty pick-up lines before taking him home. All he had wanted was to fill the hole inside him – metaphorical and literal – and stop thinking.
How bad did a dick have to be to make the opposite happen?
Any and all thought flew out of his mind when he felt something blunt push against his rim. Izuku’s hands found his hips and, grip strong and bruising, pulled Katsuki down his length in one move.
He howled. And before he knew it, the searing burn, the tension that had been building in him since the moment he saw Izuku, his sheer size–
Katsuki came, hard and embarrassingly fast for someone who painted some guy’s chest with his cum not even one hour ago.
He could feel Izuku’s surprise from the way his hands relaxed a bit. Then, because Izuku was a mean little bastard, he laughed.
Loudly.
Katsuki pressed his face into the couch even more, wanting to suffocate himself.
“Oh baby,” Izuku whispered between two chuckles, pressing hid face into Katsuki’s back. “You are so cute. Do you really want me so bad? Just feeling my dick is enough for you?”
Shame burned in Katsuki’s chest, making him try and wiggle out of Izuku’s grip. He needed to get away and hide in a little hole where nobody would ever find him again. It was one thing to come from just seeing Izuku, but having his body just feeling Izuku and deciding that’s enough–
Katsuki’s pride may have been put through hell and back just this night, but he still had a little bit of it left.
However, Izuku wouldn’t hear it.
“Oh, absolutely not.” Using his hold on Katsuki’s hips, Izuku brought him back down, fully sheathing himself and making Katsuki keen. “I haven’t come even once, Kacchan. You shouldn’t be selfish.”
And because that wasn’t enough – and Katsuki was discovering that Izuku’s sadistic streak ran far deeper than he ever thought – Izuku forced him up, bending his back even more and making Katsuki’s head fall back on his shoulder.
It puts the mess that was his face on full display, flushed a deep red and wet from tears and drool. Izuku pressed his grin against his cheeks, licking up a tear before moving to his ear. “I’m too tired to properly fuck you tonight, but I’m gonna have so much fun with you.”
Katsuki’s full body shiver made him clench around Izuku, and that was all the cue Izuku needed to get back to work. Moving his hands from his hips to his arms, Izuku pushed him off and held him up by the crook of his elbows.
Then, he started fucking Katsuki like that was the last thing he would ever do.
Katsuki was loud, which was an irony considering how much he had despised all the sounds the guy from earlier made, but there was no helping it. The overstimulation created that perfect mix of pain and pleasure, pushing him past his limit and making him feel like nothing more than a fucktoy.
There was no way he could come again any time soon, but pleasure wrecked through his body until he was nothing more than a sobbing, shaking mess, constantly dragged back on Izuku’s cock.
Izuku’s constant flow of words, degrading and breathless, was not helping.
“So fucking tight for me, Kacchan, you were made for this. You hear me, baby? Just a good little hole for me to fuck after a long day. Fuck–”
Izuku’s rhythm picked up, becoming more erratic as the seconds passed. Katsuki couldn’t even hope to meet his thrusts, but feeling Izuku’s orgasm draw closer, he clenched around him as much as he could.
Izuku came with a shout, bringing Katsuki flush against him, one hand squeezing his chest while the other found his hip again.
There was no way it wouldn’t leave marks. Katsuki grinned.
For a moment they just breathed, riding their high until they slowly came down. Katsuki had since long given up holding his own weight, letting Izuku arms be the only thing preventing from faceplanting into the cum covered couch.
They would definitely have to buy a new one.
“Kacchan.”
Katsuki hummed, rolling his head on Izuku’s shoulder to meet his gaze. Izuku’s pupils were still swallowing the green, but the thin ring of it was enough to make Katsuki warm all over. God, he loved Izuku’s eyes.
“You let anyone touch you ever again, and I will tie you to a bed and never let you out. You will literally be just a hole for me to fuck. Do you understand me?”
Katsuki laughed, then closed his eyes, basking in the way Izuku’s fingers dug into his flesh, marking him down as much as possible.
“Don’t threaten me with a good time.”