Work Text:
There was nothing else at fault; not a party, alcohol, friends pressuring him into playing games he wouldn’t have tried otherwise.
It was just the consequence of a weekend where most of their classmates had gone home to visit their parents, leaving behind no one but Katsuki, whose parents had gone off to a romantic getaway, and Izuku, who insisted that his mom said she was too busy to have him over for the weekend, though knowing him, the nerd probably stayed to keep Katsuki company.
After a few hours of studying, playing video games, and reading manga on the floor of Katsuki’s dorm room, Izuku had suggested ‘Never Have I Ever.’ It’s a good way to get to know each other again, he said, all upbeat and excited, and Katsuki didn’t have the heart to turn him down when he knew he was the reason they missed out on all those years of friendship.
Izuku found an online generator, and at first, the questions were relatively tame: Continents they’d visited, whether they ever tried alcohol, whether they accidentally called a teacher dad. Basic things they already knew about each other, which turned out to be the downside of playing such a game with a childhood friend.
It had been Katsuki who pointed at the Dirty Never Have I Ever tab on the website for some godforsaken reason, declaring ‘We know all that other shit, so we might as well learn something new’. He still wasn’t sure if it was boredom, curiosity, or plain old teenage horniness, but by now, he was sure of one thing: It was a bad idea.
“Never have I ever…” Izuku clicked the button, then paused, teeth worrying at his lip. A hurried glance, shifty, then he said all at once in a hasty mumble, “jerked off in the shower.”
The room felt too warm. Embarrassment seared his face, a rising flush of red mirroring the blush across Izuku’s cheekbones. The small, brave part of him that insisted on this category hoping for provocative questions had conveniently fled with its tail between its legs, leaving Katsuki to deal with this on his own. “Kind of.”
He blinked. “It’s a ‘yes’ or ‘no’ question.”
“I know, dumbass. It’s like—” He took a deep breath. “I tried, but I couldn’t get off. So I just gave up.”
“Oh.” He was quiet, hands twisting and untwisting in a tight tangle on his lap, beads of sweat catching the gold light from the desk lamp. His nails dug into his palms, turning his flesh white in shallow crescents. “Did you try using the showerhead?”
His voice was dangerous. “Deku.”
Izuku shook his head quickly. “Sorry! I was just wondering—the showers here aren’t that private, and I heard for people with, um, you know, it can be harder to achieve orgasm—”
If he had a boner, the phrase ‘achieve orgasm’ would have killed it. “Die.”
“—so I thought maybe a, uh, tool would help, if your hand isn’t—not that I’m saying you don’t know yourself! But—”
“Shut up!” At the outburst, Izuku fell into an abashed silence. “I’m not talking about how I jerk off with you. And you haven’t answered the question.”
His nails scraped across the inside of his palm, fingers sliding over each other. “Yeah. I have.”
That’s a fucking image. Izuku, forearm braced against the tile wall, eyes squeezed shut with one hand working his cock, hard, wrist curling as he strokes himself in a frantic rhythm, water droplets coursing down the firm, muscled expanse of his chest, his back, shit, his cock—
“Kacchan?”
Katsuki snapped out of it. “What?”
“You were quiet,” he supplied timidly. “I’m sorry, was that question too personal? I’ll find easier—”
“No.”
“Huh?”
“I’m not backing down,” Katsuki said steadily. “If we’re playing this game, we’re doing it right. None of this pussying out bullshit.”
There was an odd expression on his face: pleased, nervous, excited. Izuku wore his emotions like a diagram in a psychology textbook and it was as endearing as it was unnerving. Katsuki didn’t want to know if Izuku was excited at the prospect of asking each other more questions about sex, except that he really fucking did. He wanted to know what Izuku wanted to ask him. He wanted to know what Izuku thought of in that shower.
Katsuki cleared his throat and reached for Izuku’s laptop, pulling it over to his side. He tapped the touchpad, and the display stuttered through a few different lines before it stopped on: “Taken a nude.”
“Just once,” Izuku admitted.
Jealousy flared in his chest, sharp and ugly. “Who’d you send it to?”
“No one! It was just, um, for me. Because I—I’d been training a lot, so I wanted to see what my body looked like. If it was different.”
“And you needed your pants off for that?”
“That happens to be a very important body part.” A pause, then he added, very rapidly in a tone that said he meant it as a joke but failed to keep it casual, “I’m pretty proud of it.”
Katsuki snorted. “At least there’s one person who wants to see your dick.”
“Very funny. What about you?”
“Do I want to see your dick?”
“No! Have you taken a nude?”
“Hell, no.”
Izuku almost looked… relieved? Katsuki might have questioned it more if Izuku didn’t lean over to press the button to generate another question, and the dizzying lurch of fear-excitement-anxiety swooping in his gut knocked it straight out of his thoughts.
Did he want to see Deku’s dick? Yes. He did. Next question.
“Never have I ever—” Izuku gulped, and fuck if that wasn’t a warning sign. “Used a sex toy.”
The room was definitely too warm. Heat prickled through Katsuki’s body like the slow diffusion of a radiator’s warmth; seeping outwards, hot, heady, curling through his limbs and licking them alight. “No.”
Izuku leaned closer, his palm dangerously close to Katsuki’s knee, close enough that a simple flex and he’d be brushing against the barrier of his sweatpants. There was something flickering in his eyes, feverishly bright. “Are you sure? You hesitated.”
A breath shuddered through his lungs, coming out in a slow exhale. “I’m serious. I haven’t.”
“Is it…” He swallowed. “Do you prefer your hands, then?”
“You did not just ask that.”
“I’m just curious!”
Izuku’s curiosity was making the base of Katsuki’s spine tingle like he had an electric current running through him. “What about you? Have you used a sex toy?”
“Yeah,” he said confidently, and that sent a shock of heat through Katsuki’s body like a thermal explosion before Izuku shuffled closer, eyebrows in a hard, determined line. “The showerhead counts, you know, if you’ve used—”
“I haven’t!” Katsuki dragged a burning palm down his face, crimson with shame. “I—look, I don’t touch myself, okay? Not—not down there.”
He paused. “Oh.” Realization dawned on his face. “I’m sorry if I pushed too hard. I didn’t realize you might not like to think about—”
“No, it’s not that. I just…” Katsuki sighed, avoiding his gaze. “It doesn’t work.”
“Oh.” Izuku perked up. “There’s lots of articles you can read, techniques—”
He let out a sound that was halfway between a scoff and a hysterical laugh. “I’ve read fucking articles, Deku. It never feels that good, so like I told you, I gave up.”
Izuku fell silent. Silent for more than a minute, which was really long for someone who never shut the fuck up. Katsuki was beginning to wonder if he’d given away too much, gotten too personal—even Izuku had a limit to how much intimate talk he could take from a friend, and it wasn’t as if he’d ever shown interest in Katsuki beyond curiosity, friendly curiosity.
“You said you don’t touch yourself down there,” Izuku said finally. “What do you do?”
Another surge of heat blazed through him. Maybe Izuku’s silence was an entirely different kind of silence—maybe he’d pictured things, pictured Katsuki, the same way the confession that he’d used a sex toy had Katsuki’s mind scarlet with the vision of Izuku crouched over a fleshlight, thrusting his hips like he was fucking someone, fucking Katsuki, wishing it were him—
No. He was getting ahead of himself. “Why do you wanna know?”
“I want to help you.”
Katsuki blinked. “Help me… get off?”
“Learn how to, yeah. I don’t want to invade your privacy, but I just think if you could, it would help you relax. A lot. I mean, have you really never had an orgasm?”
“So what?” he said, feeling defensive enough that it almost made him forget Izuku had just offered to get him off. He must have misunderstood. Izuku had to be talking about a research project or something nerdy like that. “Is there a problem with that?”
“Of course not,” he said, bemused. “But it feels really good. I want you to feel that.”
Desire clenched hard in his gut, pooling in a wet throb between his legs. He could feel the dampness at his core, the slick slide of it against his briefs when he shifted, crossing his legs tighter. “Fine. I… Sometimes I touch my chest. It doesn’t make me cum, but it’s… nice. Feels fucking stupid, though.”
“It’s not,” Izuku said, his tone far more kind than it had a right to be. “You don’t have to make yourself cum to do things that feel nice.”
“What are you, a fucking sex ed teacher?” Katsuki shot back, struggling to make his voice come out normal rather than strained. His heartbeat was pulsing hot in his groin and the confident tone of Izuku’s voice only strengthened the maddening desire. “It’s not a big deal. It’s probably just broken.”
Izuku didn’t laugh, his hand inching closer, slowly, until his knuckles just barely brushed against Katsuki’s knee. The light touch sent a jolt through his body. “It’s not.”
Adrenaline gushed through his veins, a debilitating fight-or-flight that had him tensing like he was ready to make an escape, fight back, slice Izuku where it hurt so he could stop looking at him like he saw Katsuki right down to his soul, beneath blood and bone, under clothes to wanting flesh. “I—I know that.”
“Kacchan.” This time, Izuku brushed his fingertips along Katsuki’s knee intentionally, eyes intense as they scorched into his. “Can I help you?”
His breath hitched, caught in a trembling bubble behind his lungs. “What?”
“I could…” His gaze flickered downwards, and his relentless facade of confidence cracked, uncertainty wobbling in his voice. Weak and wanting. “You know, check you out. Make sure everything works.”
“You want to… touch me?” he croaked out. His mouth felt very dry, like he had a mouthful of mountain air.
“I just want to help,” he repeated, and it would be fucking peachy if he didn’t keep making it sound like Katsuki was a DIY project—something Katsuki would have pointed out if his childhood friend, rival, maybe best friend, wasn’t offering to get up close and personal with the most intimate parts of his body. Touch him with those fingers, scarred hands Katsuki thought about when he was grinding against his own too-soft palm in frustration, wishing it was Izuku’s touch, Izuku taking care of him.
Izuku was offering to take care of him now. Katsuki would be an idiot to pass it up.
“Okay,” he said quietly.
“Okay?” Izuku said, brighter.
Katsuki nodded, swallowing hard.
“Okay.” Determination was starting to settle over his face, that expression he had when he was throwing his utmost focus onto one goal. It was exhilarating and terrifying to be that goal. “Let’s get on the bed. It’ll be more comfortable.”
“Don’t care,” he muttered, but Izuku had set his mind to it so Katsuki heaved himself to his feet and climbed onto the bed. It wasn’t comfortable, his head too low and back at an awkward angle, so he arranged and rearranged the pillows until they were satisfying while Izuku waited patiently. “Okay. Ready.”
“Good.” Izuku was kneeling between his ankles, his eyes pointedly focused on Katsuki’s face, like he was trying not to glance downwards and make evident what they were about to do, like he was a friend offering another help with homework rather than a goddamn orgasm. “Actually, it might be easier if I lie down next to you.”
“Whatever,” he said, as dismissively as he could.
Izuku moved over to lay beside him, and oh, he could feel the warmth of Izuku’s body against his side, see those striking green eyes up close. His mouth looked so soft, pink, and Katsuki wanted to kiss him so bad that the mere thought of it had him clenching up. “I’m going to touch you now.”
It didn’t require a response, and Katsuki wouldn’t have been able to muster one anyway. Any intelligent thought hurtled out of his head the moment a warm hand flattened against his abdomen, slowly moving upwards, thumb brushing along the ridges of his ribs.
When Izuku reached the edge of his binder, he paused, looking up. “Can I?”
He bit the inside of his cheek. His chest had always been on the flatter side—some greater power had allowed his mother's genes to skip a generation—and training had strengthened his pectoral muscles, which helped exacerbate a lot of the discomfort he used to feel. He was still nervous, but this was Izuku. He knew Katsuki better than anyone; he would never do anything he didn’t want. “Okay.”
“Tell me if you're uncomfortable.”
He shuffled upright just enough for Izuku to peel the sweat-soaked binder and tank top off him, then lay back against the pillows, feeling a twinge of nervousness as Izuku took in the sight of his bare chest. It wasn't the first time he'd seen him, but it was the first time there was the possibility of touch. His childhood friend was about to touch him with the express intention of getting him off.
“You've gotten a lot stronger,” Izuku commented, running his index finger along the outline of his pecs. He had that look he always did when he was mentally nerding out, starry-eyed and amazed. “Really firm.”
Katsuki snorted. “Thanks.”
The pad of Izuku's finger ghosted over a nipple, and a gasp fell from Katsuki's lips, his thighs automatically squeezing together. Izuku ran his palm over his chest, squeezing the smooth expanse of muscle, then returned his attention to Katsuki’s right nipple, gently rubbing a thumb over it until it grew hard and round under his touch. “Let me know if there’s anything you want less or more of.”
“That,” Katsuki said, making Izuku let out a breathy laugh. He kept rubbing Katsuki’s nipple, soft and light, until it was so hard that it hurt. “Is that all you got?”
He glanced up. “It’s going to feel great, okay? Just let me take it at my pace.”
Katsuki bit back a protest, and his compliance was rewarded with a gentle pinch of his nipple. He arched sharply, biting his lip to suppress a noise. His nipple was so sensitive, and it definitely didn’t help that Izuku had teased and rolled it to the point where he was begging for something more. He’d have asked if Izuku didn’t beat him to the chase by scraping his nail over his nipple—Katsuki cried out, fisting a hand in the bedsheets.
“Good?” Izuku murmured.
His underwear was a mess, wetness rubbing up against him each time he shifted and squirmed. He was still throbbing, the pulses more intense now. Izuku searched his face for a moment longer, then dropped his gaze, apparently satisfied that Katsuki’s panting and the way his lips hung half-apart indicated he was more than okay with what was going on.
Izuku leaned over, chest pressing against Katsuki’s ribs as he smoothed his thumb over Katsuki’s stiff, neglected nipple. He rolled his thumb in circles over the tight bud, still maddeningly light, and Katsuki couldn’t help but push his chest up, silently pleading. He needed it, needed Izuku to press harder, pinch it, scrape a nail over it, anything.
Then Izuku leaned down and took his right nipple in his mouth, and Katsuki let out an embarrassing moan, fist tightening in the bedsheets. Izuku’s teeth nipped at his nipple as he suckled on it, squeezing and playing with the other, and heat was flooding Katsuki’s body, through his chest, his veins, a burning ache between his legs.
It felt amazing, better than anything he’d felt before, so good he didn’t know what to do with himself beyond gasp and toss his head to the side, sweat dripping down his forehead.
Izuku’s mouth slid higher, pressing kisses over his pecs, his collarbone, until he reached his neck. “Off-limits?”
“No,” Katsuki breathed out, and Izuku flashed him a smile before dipping down to suck at his pulse, and shit, it was heaven, the feeling of his mouth, deliberate suction on the sensitive skin of his neck. When Izuku pulled away, Katsuki was a gooey puddle.
“I think you’re warmed up,” Izuku said lightly, and Katsuki couldn’t help but stare at him. This, the best fucking sensation of his life, was a warm up? “Ready for more?”
Katsuki almost wasn’t ready, but he nodded. With another smile, so sweet and affectionate that it entirely disarmed him, Izuku traced his fingertips along Katsuki’s abdomen down to his pelvis, easing his sweatpants down just enough so he could rub his hipbone in slow, smooth circles.
“Lift your hips,” Izuku said, soft and firm. “I’m going to take off your pants.”
The haze in his mind came to a dizzying stop. Izuku was going to see him naked. Pants off, underwear off, every part of him laid bare with nothing to hide behind. The moment he took off Katsuki’s pants, he’d see the clear evidence of how badly Katsuki wanted this, how much he was into it, and the idea was unbearably embarrassing.
“Kacchan,” Izuku said, touching his chin, directing him to meet his eyes. “You trust me, right?”
“‘Course,” he said, almost indignantly. “But you haven’t seen me since we were kids.”
“I’ve seen you in the showers,” he pointed out, then quickly backtracked at Katsuki’s scandalized look. “Not that I was staring! I just happened to see, and, well—it wasn’t like I did it on purpose! You have nothing to be embarrassed about, Kacchan. You’re really…” He inhaled. “You’re really attractive. And your body is amazing. So strong, and beautiful, and—”
“Alright, I fucking get it.” He coughed, turning his face away. “Fine. Take my pants off or whatever. But if it doesn’t look good, I’ll kill—”
“It’ll look fine. Stop worrying and relax.”
Katsuki huffed, but he obediently lifted his hips so Izuku could drag his sweatpants down, leaving his underwear right where it was.
To his horror, it was soaked, so wet that the thin fabric was almost transparent, clinging to his body so closely that it revealed the outline of his lips obscenely. Fluid glistened over the creases of his thighs, sweat and slick, pure desire dripping from him onto the wrinkled sheets beneath them.
Embarrassed, Katsuki tried to close his legs, but Izuku pushed them apart, staring at him like he was spellbound. “That’s so hot.”
He squirmed. “Don’t.”
“Don’t continue? Or don’t call you that?”
“Don’t call me that.”
“I can’t do that. You’re—you’re hot , Kacchan. Really hot.” He nudged his fingertip into the wettest spot, and Katsuki jerked at the touch. “You’re so wet for me.”
“Shut up.”
Izuku dragged his finger down the fabric, then raised his hand. Katsuki realized what he was about to do just a second too late—just as Izuku sucked the slick off his finger. “You taste amazing.”
Katsuki’s jaw dropped. “Pervert.”
He laughed, then hooked his fingers around the edge of Katsuki’s briefs, lifting them just enough that glistening strings of fluid webbed between his skin and the fabric. Izuku pulled them further away, watching the pearly strings stretch thin, then break.
He pressed the fabric firmer against Katsuki’s crotch and rubbed his knuckles over it, gathering more slick, dragging it through his sensitive skin over and over until Katsuki was about to give into the urge to start rocking his hips—
Izuku stopped, looking back at Katsuki’s face. He was way too close, his face only inches away, eyes vivid and inescapable, gazing at Katsuki like nothing in the world existed except for him, a look that could make Katsuki fall to his knees in blissful surrender.
Tension fizzled in the air between them, a storm lit up with electricity, atoms pulling closer to each other, gravity twisting and tugging as the space between them collapsed.
Izuku’s mouth was soft as it looked, warm, and Katsuki had assumed kissing someone would have a taste but it was pure sensation , their lips moving together, a hint of tongue darting against his trembling bottom lip. He didn’t know whether Izuku had kissed someone before, if Katsuki was messing this up, but when Izuku cupped his face, tender and brimming with passion, he found he really didn’t care at all.
When they broke apart, their foreheads were still pressed together, Izuku’s hand protective on his cheek.
“Good,” Izuku said, looking dazed. “That was really good.”
“Of course it was,” he said, though he wasn’t sure what that was supposed to mean.
Izuku held his gaze, then reached down, cupping his briefs with a broad hand. Warmth seeped through his palm into Katsuki’s body, the slight pressure enough to tease him, dangle the tantalizing promise of pleasure in front of him like a forbidden apple. Testing the waters, he flexed his hips, pressing against Izuku’s hand, and he knew he’d won when Izuku’s tongue darted out to lick his lips, his gaze burning.
Carefully, Izuku slid his middle finger under the fabric, making Katsuki’s breath catch at the feeling of him touching his bare skin. He'd imagined Izuku touching him before, lying in bed with a soaking, unsatisfied heat inside him and useless fingers damp with the evidence of his helplessness, but this was different.
Everything was more responsive, the softest touch of Izuku's fingertip turning his breath ragged, charging his heartbeat to a wild rhythm that pounded in his core. He wasn't even moving and Katsuki felt dizzy, right on the edge, like Izuku could apply a bare hint of pressure and send him hurtling right over it.
His voice sounded broken in his own ears. “Deku, move.”
Slowly, Izuku's finger slid up, then down, slipping easily over the veritable waterfall of slick. Katsuki thought he knew what attraction was—the twinge in him when he saw shirtless men in magazines, when Izuku's hair looked particularly good—but apparently, he'd had no fucking idea because he had never been this turned on.
“You're sensitive,” Izuku murmured, like he was cataloging it in a notebook. “I'm barely doing anything.”
He tilted his hips up in hopes of stealing some more friction, but Izuku just moved his hand away, denying him the stimulation. Katsuki almost whined, catching himself just in time. “Stop teasing me.”
“But you look so good when you're frustrated. You should see yourself, Kacchan. So expressive.”
Izuku’s thumb brushed over another spot, and Katsuki let out a sharp cry, his hips bucking up involuntarily as pleasure tore through him like a lightning strike. It knocked the breath out of his lungs, leaving him panting, quickly glancing back at Izuku, whose face had gone scarlet.
“So responsive,” Izuku said, his voice breathy. “I wonder if I could make you cum like this, with one finger.”
He tried to sound biting, but it came out shaky. “D-dumbass. Just keep touching me.”
A hum, then Izuku rolled the pad of his thumb over his clitoris again, pulling a quieter, strained groan from Katsuki. He didn’t want to make too much noise, but it was hard when Izuku kept touching it, not letting up, wringing pleasure from him with deft touches and slow, circling motions that felt as if Izuku was grabbing his nerves and squeezing sweet sensation out of all of them.
Finally, Izuku slid his whole hand under Katsuki's underwear, burning hot and slightly damp with sweat as he ground his knuckles into Katsuki's clit, pulling a shaky moan from him.
It felt like being owned, having Izuku's large palm cover him so completely, rub him over and over until Katsuki's moans dissolved into breathy whimpers, and when Izuku leaned down to lick over his nipple, Katsuki cried out, his voice far too loud. There was something rearing up in him, and it was intense, too intense; he couldn't handle it but he couldn't tell Izuku to stop, and—
Izuku's middle finger slipped lower, sliding easily into his slick entrance.
Katsuki gasped, grabbing Izuku’s wrist. He’d ventured here before, but it was always uncomfortably dry, a painful strain. This—this was scratching an itch deep inside him, walls clenching tight around Izuku’s finger, shuddering and tensing in a rhythmic pulse. It was thick, rich, a pleasure that vibrated somewhere deep inside him, made his legs tremble like he’d been electrocuted.
“You're so soft,” Izuku whispered, his gaze drifting down to where his hand was pressed between Katsuki's legs, covered in wet, translucent fabric. “I didn't think it would feel like this.”
Surprise flashed through him. “I thought you did this before.”
He almost looked affronted. “I've never touched anyone but you.”
“Then how the hell are you so good?”
Shit. He didn't mean to say that, but it was out and thankfully Izuku was too focused on defending his honor to comment on it.
“I…” Izuku scratched the back of his neck nervously. ”I thought about it a lot.”
“You thought about it,” he said, dumbfounded, his heart leaping at the revelation that Izuku had imagined this. “With me?”
His face has gone crimson. “It's always you.”
A lump was forming in his throat. Wordlessly, Katsuki reached for Izuku, pulling him down into a kiss. It was softer than their first, tender, an expression of all the affection that Katsuki could muster even if he couldn't bring himself to admit it aloud. He raised his hands, burying them in Izuku's hair, feeling all that softness and sweat, the smell of Izuku, closer than he had ever been before.
As sweet as the kiss was, he was all too aware that his bare chest was pressing against Izuku's body, a thick finger buried inside him, and when a shiver rumbled through his body, Izuku took the cue to curl his finger, pressing firmly into a sweet spot that had Katsuki arching and choking back a whimper. He could feel the delicious shift between bands of scarred tissue and unmarred skin each time Izuku drew out and in, working him expertly.
Sweat was sticky over his skin, stinging in his eyes, ragged breaths dissolved into gasps and moans as Izuku kept up his assault, grinding into that spot over and over, sending shocks of pleasure bursting through him with each stroke.
“You like that,” Izuku murmured. It wasn’t a question, and Katsuki should have been embarrassed that he was showing his feelings so openly but right now, he didn’t give a fuck.
“It’s—shit, Deku.” He tossed his head back into the pillow, squeezing his eyes shut. There was a stall, then a second finger was pressing inside him, stretching him open, curled just right to push against that sweet spot inside him. “It’s good.”
A simmering tension was building, but it wasn’t strong enough, not enough, just a writhing, teasing thing that had him pushing his hips back to take Izuku deeper, desperate for something that could snap the tightening coil inside him.
“Good?” Izuku repeated breathlessly. “Or… would you prefer my mouth? I'd be so good for you, Kacchan, let you use my face however you want.”
It felt like boiling water had been poured all over him. “Then do it.”
Izuku didn't waste time, sitting up and shuffling down until he was between Katsuki’s legs, knees just brushing the insides of his thighs. Katsuki almost missed the closeness, but this was an excellent view, all that muscle and those freckles and sparkling green eyes laid out for him to watch as Izuku ran a slow, teasing hand up his thigh until his knuckles reached the crease of his hip.
Then Izuku was pulling down his briefs, and Katsuki raised his legs to let him guide them off his ankles, discarding them on the floor. It sent a thrill of pride through him to see the open hunger in Izuku's gaze, trailing appreciatively over every inch of his body. He knew his training paid off in his physical form, but realizing it was turning Izuku on sent another sharp throb of heat through him.
Energy thrummed through him, buzzing and twisting in his gut as Izuku lay on his stomach between his legs. He’d imagined this, having a hot, wet mouth on him, fingers moving fruitlessly against himself to the thought of it until he’d rubbed himself dry, unsatisfied, but he never thought he’d actually end up here with Izuku.
Izuku was staring down at him with eyes half-closed, lips parted, his breath warm as it landed on Katsuki’s heated skin. The anticipation was driving him mad. He could feel it in every inch of him—bones shuddering with want, flushed skin wrapped over tensed muscles, blood rushing hot through his veins, his head, his gut.
Izuku’s tongue darted out, licking over his lips before he dipped his head.
Something warm and wet touched Katsuki, and he jerked, another burst of wetness leaking out of him. That was a tongue on him. Izuku’s tongue. Between his legs.
Even the thought of it made him feel like he was about to burst; a spring wound tight, tension and pressure and energy waiting to be released, the aching desire inside him flaring stronger. He was so sensitive—a light slide of tongue up his folds and his entire body lit up like a power grid.
“Open your legs a little more for me,” Izuku murmured.
He knew Izuku could have pushed his thighs apart himself, but it sent another thrill through him to be asked; to know that Izuku wanted to give the command and watch as Katsuki slowly, shakily, parted his thighs.
Izuku nudged his thumbs into Katsuki’s folds, sparking a soft squelch, and gently spread him open. His heart was pounding, a roaring drum in his ears. An agonizing second, then Izuku was licking over his clit—hot, wet, eager muscle rubbing over him for a blissful moment before it was pulling back. Teasing.
“Deku, come on.” He wriggled his hips, hoping to entice him. “Give it to me.”
“God, Kacchan. I love it when you’re needy. I’ll give you whatever you want.”
He was about to point out that Izuku was obviously not doing that when Izuku dropped his head, pressing his face into Katsuki’s cunt, his open mouth latching deliciously onto Katsuki’s clit. A pause, then he sucked, hard.
Katsuki let out a shout, sensation exploding through his body. It was as if he’d been punched, all his nerves twisted and thrown into a crackling bonfire. Izuku was still sucking, coaxing more and more pleasure from him, and it felt like he was sucking the life right out of him, making him wriggle and gasp, legs jerking involuntarily.
“Izuku! Too much—”
He grabbed at Izuku’s hair, pulling on loose green curls, but it didn’t discourage Izuku; he just moaned into Katsuki’s cunt and sucked harder, swirling his tongue over the underside of his clit. He twisted, trying to break away from the intensity of the feeling, but Izuku’s strong hands were holding him in place while Izuku ate him like he was trying to drag his soul kicking and screaming out of his body.
“Izuku!” He thrashed on the bed, tears pricking at his eyes. It was so good. He wanted, needed, to come, but it was too good. He couldn’t handle it. “I can’t! It’s too much.”
Izuku pulled off just long enough to say, “Pop some sparks on my skin if you want me to stop,” then he was diving back in, shoving his nose up against Katsuki’s clit while he sealed his mouth over his opening, lapping up his wetness before he moved in impossibly closer to shove his tongue inside, making Katsuki clench helplessly around the muscle moving hot and wet inside him.
He clawed at the sheets, his back arching as Izuku fucked him on his tongue, spearing it in and out of him while his nose rocked up against his clit. “Oh, fuck, fuck!”
Izuku’s hands tightened on his thighs, pale skin reddening under his touch while he pushed them back to get better access to Katsuki’s cunt, dialing the sensations up into overdrive. Like this, it was so much more, so much pleasure he didn’t know how to take it, squirming and moaning with one sweaty, burning palm searing a handprint into the bedsheets while the other yanked at Izuku’s hair, pushing his face harder into his cunt, desperate for more, even when it felt like he was about to explode.
There was that build-up again, the rising crescendo of pleasure and heat and electricity inside him, but this time, Izuku wasn’t stopping, bringing him closer and closer to the edge with that sinful mouth until something inside him snapped, pure pleasure gushing through his body in an unstoppable wave that had his body trembling like he’d been shocked.
He was probably moaning louder than he should but he felt way too fucking good to care—it was everywhere, that bliss, from his spine to his toes, centered in pulsing waves between his legs while Izuku gently lapped at him, working him through it.
When it was starting to feel unpleasantly sharp, he pushed Izuku’s head away, falling boneless against the mattress. “Fuck.”
Izuku resurfaced with a grin, his lips shiny and wet with Katsuki’s slick. “You’re really loud, you know.”
“Fuck off.” He limply kicked Izuku’s ribs with his ankle. “That can’t have been your first time. There’s no way you got that good just from thinking about me.”
”Well, I…” The flush across his cheekbones deepened. “I watch a lot of videos, too.”
”Videos,” he repeated slowly. “Like… porn?”
“Um. If you’d like to call it that.”
“And were you watching these instructional videos with one hand?”
“I’d look pretty stupid sitting there watching porn with both hands on the desk,” Izuku admitted, and that was finally enough to get Katsuki to laugh, reaching up to pull Izuku down into a long, fond kiss. This nerd.
When they pulled apart, Katsuki said, “Take off your pants, I wanna see your dick.”
“Huh?”
“You just had your face all up in my business. I have a right to see what you look like naked.”
The answer was that Izuku looked fucking good naked, revealing strong, freckled muscle with each layer he stripped off, his abdomen so chiseled it might as well have been drawn on, pecs full and firm—all of it topped off with those sex-mussed curls and a sweet smile far too innocent for someone who just tongue fucked Katsuki’s soul out of him.
“Do you have any condoms?”
A wave of disappointment crashed over Izuku’s face, like it hadn’t occurred to him until that moment that a lack of condoms cut off a very real possibility. “No. But if you’re, um, interested in that, we can buy some.”
“Forget that.” He considered it, then added, “For now. Just come up here so I can suck your dick.”
Izuku sputtered, but the promise of having his cock in Katsuki’s mouth was enough to have him overcoming that shyness very quickly and scrambling up the bed.
Maybe this game was a pretty good idea after all.