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Katsuki entered the agency shower stall he always used, tired and angry from patrol. He grabbed the handle, stepped inside with a sigh and closed it behind him, locking it as he normally did—only to collide with a wet, warm body.
When his vision adjusted to the small space, he was met with broad shoulders and green hair.
“What the fuck, Izuku? You know this is my fucking stall!”
“Oh! Kacch—I’m sorry I—“
Katsuki quickly turned around to leave but started to struggle with the lock.
“The fuck is wrong with—“
“You’re hurt,” Izuku suddenly observed from behind, matter-of-factly.
“It's nothing, a D-lister got to me before I realized, I'm okay.”
Izuku’s hands suddenly touched the wound on Katsuki’s hip, making him halt and swallow a gasp.
“You should take care of it, it might get infected,” he said, caressing the wound as if it was the most normal thing to do.
“Izuku, what the fuck are you doing?”
“I just—can I help you? Please, Kacchan.”
Katsuki swallowed, and as if he was in a weird trance, he obliged, silently nodding and stopping his struggle against the lock.
Without really meaning to, he found himself melting under Izuku’s touch, allowing him to slowly trace his fingers across the wound, following it up to where the worst part of it was—on the front, next to his navel. He maneuvered Katsuki to make him face him fully.
Katsuki's breath caught in his throat at the careful touch—Izuku’s big, calloused hand pouring water and soap on the wound with utmost care.
Once he deemed it clean enough, he brought his hands up, caressing Katsuki's chest to finally rest on his big star-shaped scar. Izuku’s eyes turned dark as he massaged the area, lost in thought.
Katsuki shivered, goosebumps rising all over. They’d been dancing around each other for years now, but this was the first time they were ever this close. A bolt of adrenaline cursed through him. Maybe it was finally time they did something about it.
Izuku seemed to break from his own spell and looked up at Katsuki fully, silently asking for permission. Katsuki wet his lips, his throat suddenly dry, and that alone seemed to give Izuku his answer.
Without a word, Izuku moved his soapy hands from his chest to his nipples, and Katsuki couldn't help but let out a breathy gasp. They were closer now than when this all started, and they both suddenly dropped their gazes down to their hardening erections just barely touching.
Izuku gulped, playing with Katsuki's nubs without taking his eyes off Katsuki's half-hard cock slowly coming to life under his touch.
“Does—“ Izuku cleared his throat. “Does Kacchan like this?”
Katsuki would've teased him for being a pervert nerd if he wasn't so unbelievably horny.
“Yeah,” he said as he closed his eyes, tilting his head back and letting Izuku slowly work him to full hardness with nothing but his nipples.
He noticed the wet tip of Izuku’s now fully hard cock caress his hip, and decided it was time he did something too.
Katsuki opened his eyes and stopped Izuku’s hands from playing with his chest, intertwining their fingers together. Izuku’s eyes widened at the action, his pupils following his every move. Katsuki carefully brought his hands up over Izuku’s head, pressing his back to the wall. He joined Izuku’s wrists and held them together with one hand, caressing down his scarred arms with the other, their faces barely a millimeter apart.
Izuku gasped under him, never taking his eyes off Katsuki's piercing gaze. With this position, their cocks slid perfectly against each other, the mix of pre-cum and soap helping with the glide. Feeling hotness all over, Katsuki started to rut against him, pining Izuku against the wall as he caressed every part of his torso.
He pressed their foreheads together and nuzzled their noses, his lips barely grazing Izuku’s without actually touching them.
From this angle, he could count every freckle on Izuku’s face, and an irresistible pull to kiss each one of them overcame him. He started peppering kisses all over Izuku’s face as water travelled down their eyelids. Their breaths almost mingled from how close they were, lips close enough to devour each other. But neither of them did.
Instead, Katsuki sank his teeth into the crook of Izuku’s neck, sucking and lapping hard enough to bruise.
They were so close he could feel Izuku’s happy trail tingle his navel. Katsuki’s mouth watered at the sensation as he pressed even closer, their cocks hard and wet, moving against the other without much grace.
Izuku then growled and pushed back, easily freeing himself from Katsuki's grip. Katsuki smirked and allowed him to do as he pleased—they were clearly playing a game of push and pull, and it was Izuku’s turn now.
Izuku shoved Katsuki's shoulder and swiftly turned him around, pinning him against the opposite wall. His chest collided with the wet, cold tiles, and a shiver ran down his spine as he felt the cool touch against his throbbing cock. Izuku pressed on him from behind, shamelessly slotting his erection between Katsuki’s ass cheeks. The hot, electric friction between them was starting to become too much.
Izuku kissed Katsuki’s nape—just barely there butterfly kisses—and Katsuki felt his soul ascend at the affection.
“This is my favorite part of Kacchan,” Izuku suddenly said. He kept a strong hold on Katsuki’s hips to keep him still, humping his backside at an agonizingly slow pace.
“What?” Katsuki managed to ask, trying his best not to sound breathless—his forehead pressed against the tiles.
Izuku kept nuzzling the back of his neck, kissing and sucking on it. His warm breath against his skin was enough to bring Katsuki to his knees, but he couldn't lose now. Not yet, at least.
“I love the back of Kacchan’s neck, I always have,” Izuku said, frenzied, kissing it again and again. “I’ve always dreamed of kissing it.”
Katsuki allowed himself to be pampered, basking momentarily at the unabashed affection. He’d always dreamed of being kissed by Izuku, too—everywhere, all the time.
All sappy thoughts suddenly vanished when he noticed Izuku had started to stroke his own cock, pumping it at a ravenous pace between Katsuki’s ass cheeks as he continuously lapped at the back of his neck.
“I’m—I think I’m close, Kacchan.”
Katsuki took this as a cue to turn around, fierce as if he was in battle, and faced Izuku head on.
“Yeah?” he defied as he grabbed Izuku by the back of his neck and once again rested their foreheads together. “Are you gonna come already, Izuku?”
Katsuki started to pump his own cock as well, his gaze flicking between Izuku’s lust-filled gaze and the tips of their cocks grazing one another.
“Yeah, please, I want to come,” Izuku said, out of his mind.
Katsuki then decided to break the seemingly unwritten rule they’d been following. He grabbed Izuku’s erection firmly, brining it impossibly closer, and started pumping their cocks together. Katsuki was longer, but Izuku was definitely thicker—Katsuki felt himself salivate at the thought of tasting him someday.
“Fuck,” Izuku cursed under his breath at the direct touch of Katsuki’s hand, and Katsuki swore he could’ve came right then and there. “Yeah, please, Kacchan, keep going.”
Katsuki felt his blood pump at Izuku’s pleading and command. Izuku let him bring them both over the edge, happy to be led by Katsuki’s pace as he clumsily pushed against his forehead. A particular twist of Katsuki’s wrist made him jump, eliciting a rough growl, and suddenly, Izuku’s big, scarred hand was firmly squeezing Katsuki’s ass, the movement bringing them even closer.
“Kacchan…” Izuku started to mouth at his neck. “Please, I can’t hold it much longer.”
Izuku was squeezing Katsuki’s ass cheek with way too much force, Katsuki was convinced he’d have his hand print for days. Lost in the overwhelming sensation of feeling Izuku everywhere, he suddenly sensed Izuku’s index finger start to poke around, closer and closer to his hole. “Please, Kacchan, I need to come.”
“Go ahead, then, Izuku,” Katsuki blabbed feverishly, not really sure what he was enabling Izuku to do anymore.
Izuku pushed the tiniest bit inside, the pad of his finger grazing the puckered entrance of Katsuki’s not-lubricated-enough rim.
“Fuck,” Katsuki whispered, breathless, his heart pounding loudly in his ears.
“Oh my god, Kacchan,” Izuku exhaled, eyes rolling backwards. He unskillfully pushed inside, careful enough not to hurt him, but deep enough to feel Katsuki’s entrance warmly hugging his finger. “You’re so tight.”
Katsuki stepped up the erratic pace on their cocks, and as soon as he felt Izuku’s finger burying in up to the first knuckle, a wet, warm feeling started to coat his hand. Izuku let out a deep growl as he came. “Kacch–”
The sensation of Izuku’s cum coating all over his cock, Izuku’s cock pumping, still spurting right beside his, and the pressure of his finger opening him up collided into a big, shocking explosion unlike anything Katsuki had ever felt. Everything was Izuku, Izuku, Izuku.
“Fuck, Izuku—”
Katsuki’s orgasm hit him like a tidal wave as he came with a gasp, his voice completely gone. When he came to, he noticed Izuku helping him ride it out, softly pumping his cock and milking him dry.
Izuku’s eyes were half lidded, his cheeks a red so bright it almost swallowed his freckles. He smiled at Katsuki adoringly, as if he was responsible for all the stars in the sky. And just when Katsuki was about to break the silence with some witty remark to ease the tension, Izuku shut him up with a kiss.
It was soft, nothing like what they had just done. He started out slow, waiting patiently until Katsuki got his bearings. He licked at his bottom lip, making his way in tentatively as he cradled his cheek with one hand, the other one still caressing his softening dick. Izuku hummed into the kiss, and a soft, warm rumble traveled all the way through Katsuki’s chest. It felt so good, so right, to be close like this.
Katsuki kissed him back as softly. He was never good with words, but he hoped he could convey everything he felt for Izuku like this.
They parted for air, and the weight of everything that just happened fell heavy upon them. Katsuki noticed how Izuku seemed embarrassed beyond belief.
“You’re supposed to kiss me first before shoving your finger up my ass, you know?”
Izuku turned an even deeper shade of red.
“Kacchan! Oh my god, shut up! Someone could hear you!”
“Oh, so now you worry about people hearing us. It didn’t seem like you cared one bit when you were growling like a dog in heat.”
Izuku snorted and buried his burning face in the crook of Katsuki’s neck. Katsuki felt a jolt of electricity run across every nerve in his body at the sound.
“Please, Kacchan, have some mercy,” he pleaded.
Katsuki’s heart doubled its side at the intimacy of it all. “Tch, only if we continue this properly at my house,” he challenged.
The vulnerable, insecure side of him cowered at his own boldness. Maybe he’d gone too far? Maybe Izuku didn’t want t—
“Okay, fair enough,” Izuku hummed as he kissed Katsuki’s collarbone and lifted his gaze. “I’d love to, Kacchan,” he said with a beaming, innocent smile, as if they weren’t talking about fucking each other’s brains out. He finally offered his hand to him.
Katsuki smirked, his heart somersaulting inside his ribcage. He figured they still needed to talk things out. And he knew they would, eventually, but for now, he had everything he’d ever dreamed of in the palm of his hand. Literally.
Katsuki grabbed it and held tightly, feeling stupid for not having done it sooner.
Well, better late than ever.
“Let’s go then, nerd.”