Work Text:
Katsuki and Izuku broke up for various reasons. Starting college made their schedules busier, resulting in the two not getting to really see each other often. But, furthermore, with going to a new school also meant new people, and new people meant more opportunities for one another to get jealous.
Though, the straw that broke the camels back was all the people suddenly romantically or sexually interested in Izuku. And boy Katsuki couldn’t stand it. Practically everyone was ogling over his boyfriend. He knew the man was sexy as fuck, but damn it that doesn’t mean everyone else could try and get with him!
While there was no cheating or suspicious activity, it became a very sore subject. Katsuki would immediately be in a bad mood whenever someone even looked at his boyfriend a certain way, and Izuku instantly got annoyed when he noticed the sudden change in Kacchan’s behavior whenever it happened.
The feelings ultimately resulted in the end of their relationship. Out of all the motions the two went through and ended with, there was more anger than anything, and in conclusion the two became “enemies”.
It was constant jabs and insults thrown at each other when they were both in the room, which unfortunately was often considering they shared the same friends. They complained about one another constantly, and made sure life was difficult for one another whenever given the opportunity.
So when their parents told the two they were taking a vacation to the beach, it was safe to say they were pissed, and they were even more pissed when they realized they had to share a room.
“I know it might be awkward for a bit, honey.” Izuku’s mother said in an apologetic tone. “But this beach house was in such a good spot!”
Izuku couldn’t stay mad at his mom, and he couldn’t be upset with auntie Mitsuki or uncle Masaru, either.
So, he sucked it up and forced a smile. It seemed Kacchan decided to take the same road, considering they were both in the small room unpacking their things in a tension filled silence.
They were able to avoid talking to one another throughout most of the day. Izuku tried to hide his irritation at the obvious glares the blond man occasionally sent him. He wasn’t gonna ruin his well deserved vacation with his mom and auntie and uncle, regardless of the gremlin tagging along.
Izuku even decided to have a little fun. He was on vacation for heavens sake, and maybe he’d get the opportunity to get under a certain blonds skin just a bit more.
While at a tiki bar lounge Izuku decided to give in to a guy that was flirting with him. Hell, he even let the man buy him a drink. He didn’t think he was all that attractive, and this definitely wasn’t going to result in anything serious. But, it did seem to get the previously mentioned blond fuming, and that was a win in Izuku’s book.
He relished in satisfaction at every touch the stranger gave him, laughed at every joke the man told. It wasn’t because the man was actually funny, or that the touches sent shivers down his spine. No, it was because out of his peripherals he could see how Kacchan’s fists could clench and his jaw would tighten every time the stranger made an advancement.
Izuku sent a small smile Katsuki’s way as the stranger placed his hand on the small of Izuku’s back, silently cheering himself on in his head.
Katsuki was quiet on the walk back to their rented house. Izuku was smug, fully believing he’d finally won their unofficial ‘I can piss you off more’ contest.
When their parents retired upstairs to relax and do a little more drinking, Izuku decided he was gonna call it a night and crash in his bed. While humming to himself, as he approached his bed a hand latched around his wrist.
“Can’t help but be an attention whore everywhere, huh?” Katsuki asked through gritted teeth.
Izuku rolled his eyes before turning his head to look back at his ex boyfriend. “I don’t understand why you’re so mad people want me.”
He tried to pull his wrist from the man’s grasp but the blond didn’t let go. “I’m sick of it.” Katsuki spat. “Think you can just go around batting your eyelashes for anyone and everyone tryna get in your pants?”
Izuku glared at the red eyed man and groaned. “Oh shut up, Katsuki. You’re just mad you don’t get me all to yourself anymore.”
Red eyes widened before narrowing again, a dangerous smirk dancing on pink lips, stretching over pearly white teeth.
“I think I can.” He said in a deep voice.
Suddenly, before he could process what was happening, Izuku was spun around, Katsuki grabbing his other wrist and pushing him face first onto the bed, pinning his arms behind him.
“Hey!” Izuku shouted trying to wiggle out of the man’s grasp.
He felt the warmth of Katsuki’s larger body slowly press against him, body heat quickly soaking into the cooler surface of his back.
“Maybe I do just need you to myself again.” Katsuki grinned against the smaller man’s ear.
“Like hell.” Izuku growled back in a low tone.
He tried to wiggle again and felt the hardness of Katsuki’s growing erection press against his ass. A warm blush spread across his face, making him stop his movements.
“Stop acting like you want anyone besides me.” Katsuki said leaning up to where he only had his loose swim trucks pressed tightly against Izuku’s ass, barely covered by a tiny pair of shorts.
“I don’t!” Izuku shouted in retaliation.
The man behind him simply snorted and responded. “Okay.”
Suddenly the hands that were holding onto his wrists let go, though Izuku could still feel the blonds erection through the layers of thin fabric.
“If you don’t want it, get up then.” Katsuki said calmly and shrugged.
Izuku puffed out his cheeks. Kacchan got on his very last nerve, always pushing his buttons and pitching a fit at any guy who gives Izuku even just an ounce of attention. It was beyond irritating, why did he have to act this way over the greenette when he’s the one who dumped Izuku!
But the smaller man knew good and well he was still interested in the man. He just didn’t want to be walked over by the blonds strong personality. He didn’t want Kacchan to think Izuku would just fall to his knees and do anything at his very ask.
Izuku sighed, bringing his arms up to rest under his chin and lifting his legs to crawl up on the bed.
Katsuki huffed, annoyingly realizing the man really was getting up and didn’t like the blonds advances. He was probably about to slap the shit out of him for even trying.
But Izuku stopped, and he didn’t get up completely.
Instead he remained face down, but lifted his hips up slightly, pushing back just enough so that Katsuki’s clothed cock pressed against the damp outline of his pussy.
“Oh?” Katsuki asked smirking, placing his hands around Izuku’s trim waist.
“S-shut up.” Izuku murmured, burying his reddened face into the covers.
Katsuki slowly began grinding against Izuku, pulling a small whine from the embarrassed man below him. “I knew it. I knew you still wanted me.”
“I never said that.” Izuku lifted his head and breathed out, reaching underneath himself to unbutton and unzip his shorts.
Katsuki hummed, grabbing the sides of the skimpy shorts and pulling them alongside his panties down freckled thighs, lifting each leg to get them off completely. Katsuki stared at the sight before him, completely drinking in the soft curve of the man’s ass alongside the pretty pink pussy plush between thick thighs.
“Right. M’sure you let anyone with a dick play around with you.” He muttered.
Izuku was about to snap back at the blond but cut himself off with a quiet moan as a large, rough finger brushed across his clit. Katsuki smirked, running the same finger up smooth folds and directly into that wet heat. Izuku bit his lip, trying to stifle his moans as Katsuki began thrusting his finger in and out.
“No snarky remarks?” Katsuki asked leaning down closer to his ex boyfriend. “You had a lot of shit to say earlier.”
The blond added another finger, relishing in the way the man’s pussy immediately sucked him in, wetness collecting at the joints of his fingers. Izuku tilted his head up, letting a louder moan escape his lips.
“Fuck.” Katsuki growled pumping his fingers faster. “You’re really wet. Haven’t all those extras been fucking you right?”
Izuku turned his head and glared best he could at the blond. “Y-you know good and well I h-haven’t been sleeping around.”
Katsuki grinned and left a messy kiss against the man’s exposed cheek. “Good. I haven’t either, and if I only jerk off anymore I might go insane.”
Izuku scoffed and lifted himself up on his elbows. “Then get to it before I find someone el-!”
Izuku was shut up by a hand pushing his head face first into the sheets below him, fingers gripping onto silk curls. Suddenly the two fingers inside him disappeared, making Izuku whine into the sheets. There was a bit of shuffling behind him before something warm and hard pressed against his hole.
Katsuki ran the tip of his cock down Izuku’s folds and brushed it over his twitching clit. The greenette jerked, moving his hips to try and lead Katsuki’s cock back to his aching hole.
“Eager much?” Katsuki laughed, trailing a hand up and down the man’s spine, squeezing onto his hips and ass. “Didn’t you say you didn’t want this?”
Izuku didn’t respond, just shaking, silently begging the man to stuff him full. Katsuki took to lining himself up again, finally pushing into that hot, sopping pussy.
“Fuuuck.” Katsuki groaned as he pushed himself in and out, slowly fucking into the man below him.
Izuku let out a long moan that was partially muffled by the sheets below him, unconsciously spreading his legs wider to easier fit the man behind him. Once completely inside, Katsuki let go of the grip in green curls and placed both hands against Izuku’s waist, leaning his forward to rest his forehead between the man’s two shoulder blades.
The two sit there for a minute, Katsuki allowing Izuku to get used to his size. After a few moments pass, Katsuki slowly pulls out until just the tip is inside, then quickly thrusts back in all at once.
This time the moan Izuku let’s out is loud and clear, and it gives the blond all the encouragement he needs. Electricity instantly spreads through Katsuki’s veins, every wet dream and sexual thought of his green haired ex from the past few weeks coming to a crashing halt.
Katsuki quickens his pace, the slap of skin against skin becoming louder and more frequent alongside the pants and moans escaping Izuku’s lips.
“K-kacchan, harder.” Izuku panted between whines.
The blond just grunted in response, quickening his pace and tightening his grip to thrust in that squelching cunt with more force.
Izuku’s moans become higher pitched, and mixed with the growing sweat between their bodies increasing the slapping sounds creates an obscene harmony in the small room.
Katsuki groans as he watches Izuku’s tight cunt suck his cock in over and over, mesmerized by all of him fitting inside the small man.
“All those assholes wish they could do this.” Katsuki said snarling. “Fuck this tight ass pussy.”
Izuku felt his eyes roll to the back of his head as the tip of Kacchan’s cock kissed his sweet spot with each thrust. The warmth of the man behind him mixed with each harsh thrust made the greenette feel like he was gonna melt, become goo in the blonds hands.
The filthy sounds of their fucking completely filled the room, Katsuki’s animalistic snarls mixing with Izuku’s wanton moans and pleads of faster, harder.
“So, hah-! big!” Izuku cried digging his fingers into the sheets. “Cum in me, Kacchan! F-fill me ah- up.”
Katsuki grinned, his tight grip on the man’s waist sure to leave bruises. “Want me to creampie this pussy, baby?”
Izuku nodded his head best he could, unable to form words as his ex picked up the pace and started brutally fucking him.
The bed began to shake below them, sweat slicked skin slipping from the blonds grasp, trying to grab onto thighs and hips to keep fucking into those sweet velvety walls.
Katsuki’s thrusts started to become uneven, and the blond leaned down next to the greenettes ear. “Cum for me, baby boy.”
And Izuku immediately did, velvet walls clenching down on that thick cock and letting out a broken, gargled moan as he fell limp against soft sheets.
Katsuki stilled soon after that, filling Izuku up completely before plopping down atop the smaller man’s freckled back.
“Missed that.” He murmured.
Izuku just rolled his eyes, a soft smile on his lips as he kissed the side of sweaty blond hair.
The next morning the two entered the small kitchen and living room to see their parents there, awkwardly smiling.
“So I take it you two are back together?” Inko asked sweetly after a beat of silence.
Izuku pales, suddenly realizing they weren’t quiet at all last night, and that their parents probably heard everything.
Damn it, Kacchan!
“Yeah.” Katsuki snorted, throwing his arm around the grumbling greenettes shoulder.
Whatever, Izuku would get over it eventually. After all, he didn’t have to pretend to hate Kacchan anymore.