🦋Butterflies🦋 ~ ShinKamiBakuDeku

Relieving Tension

⚠️SHORT SMUT WARNING AND SLIGHT NSFW LANGUAGE⚠️

"Ah, f-fuck, Kacchan," Denki moaned, throwing his head back into Katsuki's mattress. The pillows and blankets were scattered on the floor, and their clothes and sheets were in a tangled mess at their feet. Katsuki held Denki's wrists above his head, staring down at him as if he were prey. Katsuki had to admit, hearing his childhood nickname– Izuku's name for him– slip out of Denki's mouth really struck a nerve. A good nerve. He forced himself deeper into the blonde beneath him, soaking up every breathy sound he failed to hold back.

"You're such a fucking slut," Katsuki slurred, bending down to nip at Denki's neck. "You liked getting destroyed by my cock, Sparky? You like being used like the little whore you are?"

Denki whined, screwing his eyes shut as Katsuki shifted his hips to just barely brush against his prostate, a ghost of a touch. Katsuki knew every good inch in and on Denki's body. He knew the right words– slut, whore, useless bitch, moaning like a pornstar– to rile him up and make his stomach flutter.

And Denki had a few tricks up his sleeve, too.

"Y-yes, please, harder," he cried, nuzzling into Katsuki's collarbone. "Fuck, f-fuck, Kacchan! You're so good, ah- f... fuck, such a good boy, Kacchan–"

Katsuki shut him up with a kiss. He knew Denki knew about that annoying little praise kink of his, and while it wasn't nearly as perverted as the things Denki was into, Katsuki was still embarrassed. He didn't know why getting called a "good boy" did anything to turn him on, but he couldn't help it. He sped up, his grasp on Denki's wrists tightening, bruising him.

Denki loved it. He wrapped his legs around Katsuki's torso as they both hit their climax.

After taking a few heavy breaths, Katsuki rolled over, covering his eyes with his forearm. This was a routine the two of them had once or twice a week. Katsuki would shoot Denki a text, something vague, and Denki would get the hint and sneak into Katsuki's dorm. They'd have sex, then fall asleep, and since Katsuki woke up so early, there was always enough time to transport a groggy Denki back to his own dorm.

It was their secret. For all they knew, Katsuki went to bed at 8:30 every night. No suspicion, no questions asked.

Until Shinsou-fucking-Hitoshi had to shove his nose somewhere where it didn't fucking belong.

"Yo Blasty," Hitoshi teased, elbowing him in the side.

The two, along with the other path of miscellaneous students, were in the library with Snipe for after school detention. The rules were no talking or communicating of any kind, so while Hitoshi blatantly ignored that rule by whispering to the blonde beside him, Katsuki opted to growl in response instead.

"Down doggie, bad doggie. No growling or you're not getting any treats," Hitoshi taunted.

"I'll fucking kill you," Katsuki snapped under his breath. "I'm not a goddamn dog."

Hitoshi hummed, leaning so his lips brushed against Katsuki's ear. Thankfully, the first year student in front of them was built like a wall, hiding them from the teacher. "Is that so?" Hitoshi teased. "Sparky's phone seems to think otherwise. Y'know he has a video in his camera roll of you fucking him while he tugs on the chain connected to your red leather collar–"

Katsuki squeaked, then cleared his throat, choking on his own shock. The room turned to face him, confused and concerned, but he just waved them away. "I'm fine, extras. Something got stuck in my throat."

Everyone went back to minding their own business, getting late school work turned in and such. Hitoshi smirked, sitting back in his seat. "Something stuck in your throat, huh? How often does that happen?"

Katsuki squeezed his eyes shut, forcing his body to calm down, his heart to stop racing in his chest. Who the fuck was this loser, thinking he could tease the Bakugou Katsuki?! He wouldn't let himself get belittled by this random nerd. So he forced the corners of his mouth to twitch up into a devious smile, resting his hands comfortably on his knees. "Once or twice a week, yeah. Why? You jealous? Maybe if you shut the hell up, get on your knees and beg, I'll give you a sample of the special treatment. Not like you deserve it, eyebags."

This time, Hitoshi had to turn his head away and clear his throat. He expected angry, flustered Blasty; he didn't not expect flirty Blasty. He'd have to regain his composure and keep pushing the plan forward. He already got Katsuki to (basically) admit he was hooking up with Denki, and now he just had to get him to admit his feelings for Izuku. From there, Hitoshi could hint at his developing relationship with the freckled boy, and Katsuki could flip out, blah blah blah, and run off to Izuku.

Izuku made it clear that he could work with Katsuki as soon as he was royally pissed, which Hitoshi found weird, but he already decided to trust him so here he was, poking a wild bear.

"Yeah? I doubt you're any good," Hitoshi chuckled softly. "I mean, Freckles is number one for a reason. If only you knew the type of things his mouth can do."

Katsuki shivered with rage. "What the fuck are you talking about?" he sneered.

Hitoshi tilted his head, feigning innocence. "Why, Midoriya Izuku of course. What? Did you forget the love of your life's name while you were railing Sparky?"

Katsuki's face erupted with an embarrassed blush. "H-how did you–"

Hitoshi shrugged. "Just a guess. Don't worry about it. Izuku doesn't know. He was too busy on his knees for me."

Sparks popped on Katsuki's palms as his vision blurred. "You better be fucking lying," Katsuki snarled. "I swear to god, Eyebags, you better be lying."

"Look who's jealous now. Gee, no wonder Sparky put that collar on you. You're such a bad boy. And I bet you liked it. Did you like it, Kacchan?"

"No, you FUCKING–" Thanks to Hitoshi's quirk, Katsuki's lips were sealed for the rest of detention, keeping them both out of any more trouble.

As much as he wanted to brutally murder Hitoshi, Katsuki decided it was best to talk to Izuku first and get the facts. He stormed up to the freckled boy's room, shoved the door open, closed it behind him, and stormed over to the bed. He flopped down beside Izuku, face down, and screamed like bloody murder into an All Might themed pillow.

Izuku giggled. "I'm guessing Toshi talked to you?"

Katsuki's ears were as red as a stop sign. "Nicknames? YOU HAVE A FUCKING NICKNAME FOR HIM?!"

"No need to get jealous, Kacchan," Izuku cooed. "Yours came first."

"Of course mine came first!" Katsuki cried. "I don't know why his came at all!"

Izuku shrugged. "Maybe it's because he got the balls to confess to me while you're still denying it."

Katsuki gulped. "Huh? What are you–"

Izuku closed the book he was reading and glared at the boy beside him. "I don't know about you, but I've wanted to kiss you since we were five. I had a theory that you were going to reciprocate my feelings after everything with Shigaraki settled down, but here we are. Not kissing."

Katsuki's mind was going a mile a minute. "You like eyebags," he blurted, his face pinched into a grimace. "Why the fuck would you want me romantically? I can't... I'm not exactly the best with... romance."

Izuku smiled, resting his palm on Katsuki's cheek. "We have a lot to talk about," he whispered. "But for now, just know I like you. I love you. I have for as long as I've known you."

Katsuki laughed, soft and simple, making butterflies erupt in Izuku's stomach. "You have a terrible taste in boys," he muttered, curling his fingers around Izuku's wrist.

Izuku shrugged. "Maybe. But it's not changing any time soon, so why don't you kiss me and make this official?"

Katsuki broke the gap between them, soaking in the surrealness of Izuku's lips finally against his.

A/N: again, thank you so much for reading <3 it means a lot, seriously.