BNHA One-Shots and Short Stories (x Reader)

Big Secret : Eijirou Kirishima and Katsuki Bakugou

There was a new feeling ever since you'd become official; a sickness churning in the pit of Katsuki's stomach. Oddly, he vaguely recognized it from when that damned Deku would constantly show him up, but this one was always much stronger, somehow even more painful.

Why did he wince every time you went to grab Eijirou's hand? Why did he find himself with the urge to go be sick when he'd first seen Eijirou lean over to give you a peck on the cheek? It had been because it was gross couple stuff, right? Bakugou wasn't here for all that nasty touchy-feely stuff. He'd seen his parents do it, and it disgusted him. And now his best friends were doing it with each other; sometimes right in front of him, sometimes when you thought he couldn't see.

But he saw, and he knew. He'd heard you, late that night after training. Heard the two of you noisily entering Kirishima's room, clicking the lock on the door as you'd stumbled to the opposite wall. He'd listened to everything: the telltale sounds of skin meeting skin and coming together. He'd heard both your sweet, pretty voices, desperately trying to keep quiet as foreign waves of feelings coursed through your bodies on the other side of the wall. The thin wall, where every sound was as plain as if the barrier hadn't been there at all.

He should have stopped himself then. He should have given up all hope, closed down all his feelings. He'd laid awake the whole night, thinking about how his two best friends were now seeing each other in this way. You were third years, and having relationships within the class was to be expected. But his best friends? Together? And now it was just him. The sideliner. The outcast. The third wheel. Alone.

He'd been forced to listen. It hadn't been his choice. It was even less his choice when the two of you had approached him the next day, listening one last torturous time to you as Kirishima sheepishly explained that the two of you had become an item. Bakugou pretended like he didn't already know.

He should have stopped hanging out with you, distancing himself as the two of you grew closer. But this had all happened almost four months ago, and he hadn't been able to force himself away from either of you. He couldn't tell if he resented you both or genuinely enjoyed your company.

What did it matter? It was only his stupid emotions, stupid feelings bleeding through his inforced walls. He had other things to focus on, better things. Like being a hero. Training to be at the top of the class, climbing ever higher to surpass All Might and be the number one hero. That was his goal. That was his purpose. It had nothing to do with his idiot, overly supportive best friends—if he could even call you that anymore.

"My notes?" Eijirou's voice questioned.

"Yeah," Bakugou said. "Where are they?"

"My desk," Eijirou said. "Like always. My door should be open, you could have just taken them."

Bakugou scowled. "Oh," was all he said.

"Hey, we're having a spa night," you piped up.

"I noticed," Bakugou shot back.

"Ooh, you should totally join us, Bakubro!" Kirishima's green-caked face slipped into a grin with ease, flashing his ridiculously cute sharp teeth.

"Yeah!" It was your turn to beam, face lighting up in your smile. "Spa night for three!"

Just the three of you. That sounded wonderful. And also absolutely terrible.

Bakugou scoffed. "You're not going to get me to do your childish nonsense. I need to go study. And then sleep."

"The gren-nerd returns," you said, rolling your eyes. "Come on, Blasty, there is such a thing as too much sleep."

"Yeah," Kirishima agreed. "Besides, it's a Friday night. You have all weekend to do whatever. Have some fun with us and lighten up for a change!"