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The Things He Doesn't Know — K. Bakugo
This is part nine of the series, so chapters will be on the m.list.
☞ Link: click here.
Pairing: Katsuki Bakugo x Jealous female reader
Synopsis: When you realize you're in love with your childhood best friend, but force you're feeling's down for the sake of your friendship.
Author's note: 🫢 Is all I have to say. It's a long one.
You can’t get Kimiko’s words out of your head.
"I think you and I both know you’re full of shit."
What did she mean by that? And why couldn’t you just let it go?
It wasn’t just the way she said it. It was the look in her eyes, the smug, knowing smirk tugging at her lips like she had figured something out before you did.
It irritated you to no end. Everything Kimiko did made you mad.
But this? This was something else entirely.
Her constant flirting with Bakugo got on your nerves, but more than that, it made you sad. Every time she leaned into his space, every time she laughed a little too sweetly at something, he said, every time she called him Katsuki so casually, like she had the right to? it made your stomach twist. It wasn’t jealousy, was it?
No. It was something worse. Something heavier. Because she could do all those things, and you couldn't. Or rather, you wouldn’t.
You sigh, rubbing your temples as you slump against your desk. Kimiko had a way of making sure her words stuck in your head like a splinter, and you hated it.
This was probably her plan all along, to make you overthink, to make you question yourself. And the worst part? It was working.
A sudden knock on your dorm door startles you out of your thoughts.
"Who is it?" You call out, still lying face-down on your desk.
"It’s me. Open up, dumbass."
Bakugo.
For some reason, your brain immediately goes into panic mode. You sit up straight, smoothing your hair down and glancing around your mess of a room. Why did it suddenly feel like a disaster zone? Why did you care?
You hurriedly shove a pile of clothes under your bed and straighten out your sheets before clearing your throat. Get it together.
"Um… come in!"
Bakugo opens the door, stepping inside, and you abruptly stop what you’re doing, frozen mid-motion like a deer caught in headlights.
"Hey."
"Hi."
Silence.
Bakugo lets out a small grunt before plopping down onto your bed like he owns the place.
Meanwhile, you just stand there awkwardly, shifting from foot to foot. Why were you acting like an idiot? He’d been in your room plenty of times before. Hell, he’d seen it in way worse conditions, so why were you acting like some flustered fool now?
"What brings you here, partner?" You lean against your desk, trying to act casual, trying, and failing.
Partner? Partner?! Could you sound any more stupid?
As if to further cement your humiliation, your elbow knocks over a pile of books, sending them tumbling to the floor.
"Shoot," you mutter, scrambling to pick them up.
From behind you, Bakugo lets out what sounds close to a laugh.
You freeze.
That was a laugh.
Your face burns as you quickly gather your books, your fingers fumbling. It was just a laugh. Just a laugh. Don’t be stupid, Y/N.
"So… you wearing that out?" Bakugo suddenly asks.
You glance down at yourself, oversized, wrinkled T-shirt (with a mysterious green stain you’d rather not think about), old sweats with a hole in the knee.
"Well, uh—wait. Out where?"
Bakugo stares at you like you’ve grown two heads.
"Seriously? You don’t remember?"
You blink. What the hell is he talking about?
"No? Did I forget a birthday? Whose did I forget? Kaminari? Kirishima? Mina—"
"No, you dumbass. Chill out." Bakugo rolls his eyes. "We’re going to the arcade. Me. You. The other extras."
Oh. Right.
Your stomach sinks a little. You had completely forgotten. It's probably because Kimiko would be there.
"Heh… right. I totally remembered that." You mumble, scratching the back of your head.
Bakugo narrows his eyes at you. "It’s not like you to forget."
His words catch you off guard. "Something on your mind?" That’s not something he usually asks.
"Er, uh, no. Just slipped, y’know?" You force a grin.
Bakugo doesn’t look convinced, but he lets it go.
"Right. Well, get ready unless you wanna go out looking like a damn hobo."
"Hey, not too much now." You chuckle, grateful for the shift in topic.
Bakugo huffs and stands up, heading for the door.
And you should let him go.
But you don’t.
Before you can stop yourself, your hand shoots out, grabbing his wrist.
Bakugo stiffens slightly, glancing down at your hand, then back up at you. His expression is unreadable.
"Um… you can stay, y’know." Your voice comes out quieter than you intended. "And we could head down together. Like we used to?"
For a second, he just stares at you, eyes scanning your face. Then...
"Okay."
You got an okay!?
You let go of his wrist and step back, heartbeat hammering in your chest as you quickly escape to the bathroom to change. You try really hard not to freak out.
By the time you and Bakugo head downstairs, everyone is already gathered in the common room. Kaminari jumps up from the couch the second he sees you.
"Finally! Took you two long enough. Let’s go!"
"God, Kaminari, could you be any more impatient?" Jirou sighs, standing up.
Kaminari and Jirou are the first ones out.
"Wow, man, I didn’t even have to drag you out this time," Kirishima teases.
"Shut up," Bakugo grumbles, walking past him.
Kimiko, because of course she does, immediately rushes to Bakugo’s side, smiling sweetly.
Major eye roll.
The arcade was alive with flashing neon lights, the sharp chimes of tokens clinking into machines, and the occasional victory yell from a lucky player.
The air smelled of buttered popcorn and cheap pizza, the kind that tasted way better than it should.
You had barely stepped inside when Kimiko started her Bakugo antics.
“Hey, Bakugo,” she said, flipping her hair over her shoulder. “Wanna team up? I bet we’d destroy everyone else.”
Before Bakugo could respond, you felt his hand on your wrist.
“Nah,” he said, pulling you along. “Already got plans.”
Your heart jumped at the sudden contact, and Kimiko’s expression flickered, just for a second, before she forced on a smirk.
“Oh, I see,” she said, crossing her arms but making no effort to hide her displeasure. “Have fun, I guess.”
Bakugo didn’t even acknowledge her before leading you toward a row of games.
“Pick something,” he said, hands shoved in his pockets.
You grinned, trying to ignore the warmth still lingering from where he grabbed you. “What, giving me full control? That’s dangerous, Bakugo.”
“Tch. You act like I won’t kick your ass at whatever we play.”
That, of course, became the challenge of the night.
First game: Air hockey. You managed to score a few points, but Bakugo, with his stupidly good reflexes, sent the puck flying into your goal more times than you’d like to admit.
“Damn it,” you muttered, watching the scoreboard light up with his victory.
He smirked. “Hope you’re not gettin’ discouraged already.”
Second game: A co-op zombie shooter. The two of you stood side by side, plastic guns in hand, mowing down wave after wave of the undead. You weren’t sure if it was just the adrenaline or the fact that Bakugo actually made a pretty solid teammate, but you found yourself laughing at how serious he got, cursing every time he missed a shot.
By the time you reached the final boss, you were both on your last lives.
“Shit, move, dumbass, you’re in my line of fire!”
“You move, I’m covering your left!”
Somehow, you both landed the final shot at the same time, causing the screen to flash VICTORY! in bold letters.
You turned to Bakugo, grinning. “We actually make a decent team.”
He snorted. “Obviously. You’d be dead without me.”
Final game: The claw machine.
Bakugo wasn’t one for the “kiddy” games, but after catching you eyeing a plush sitting in the pile of prizes, he shoved a few tokens in without a word.
“You don’t have to win me anything,” you said, watching as he maneuvered the claw with expert precision.
“Didn’t ask,” he muttered.
It took him three tries, but eventually, the claw managed to grab hold of a stuffed bear with lopsided button eyes and a slightly crooked smile. He pulled it out and tossed it to you, acting as if it was no big deal.
You hugged the bear close. “He looks a little messed up.”
“Yeah, well, figured he suits you.”
You rolled your eyes, smiling. “What should we name him?”
Bakugo tilted his head, pretending to think. “Dynamutt.”
You burst out laughing. “That’s awful.”
“Like you could come up with somethin’ better.” He mutters.
You glanced down at the bear and grinned. “Fine. Dynamutt it is.”
By the time you all returned to the dormitories, everyone had collected their fair share of arcade prizes.
Kirishima had an armful of plushies from a rigged punching game. Mina somehow ended up with a collection of flashy LED glasses. Kaminari and Sero had spent most of their time hoarding candy from a ticket machine.
You held Dynamutt close as you flopped onto one of the common room couches, exhausted but content.
Bakugo sat down on the opposite couch, and before you could blink, Kimiko plopped down beside him, far too close for comfort.
“So,” she started, tucking a strand of hair behind her ear. “Did you have fun tonight?”
Bakugo just shrugged. “I guess.”
Kimiko giggled, tilting her head. “You’re always so hard to please, huh?”
You watched as she leaned in slightly, her voice dropping just a little lower.
“You know, I bet I could make things more fun for you,” she added, her fingers barely brushing against his arm.
You clenched your jaw. There it was again, that same feeling that had burned in your chest at the party and many times after.
The frustration, the annoyance, the overwhelming urge to say something.
But not here. Not in front of everyone.
“I’m gonna get some fresh air,” you mumbled, standing up abruptly. “Be back soon.”
Sero, who had been watching the entire thing, shot you a knowing look before getting up as well. “Yeah, me too.”
The cool night air was a relief against your heated skin as you leaned against the railing outside the dorms.
Sero stood beside you, silent for a moment before finally speaking.
“She really gets to you, huh?” He said, casually shoving his hands into the pockets of his jeans.
You let out a bitter laugh. “Is it that obvious?”
“Only to me. I know the feeling.”
You turned to him. “Kimiko?”
Sero sighed, running a hand through his hair. “Yeah. I mean, I know I don’t have a chance or whatever, but watching her go after Bakugo like that… it sucks.”
You hesitated before admitting,
“I don’t even know why it bothers me so much. I mean, I do, but…”
“But?”
You swallowed hard. “It’s like some part of me still doesn’t want to admit it.”
“That you love him?” Sero blurts out.
The words made your stomach flip. "Yeah.." You kick a small pebble.
Sero smiled knowingly. “Denial’s a bitch, huh?”
You groaned. “God, you’re the worst.”
“Nah, I’m the best. And I think you should tell him.”
You gave him a look. “Oh yeah? And what about you? Gonna confess to Kimiko?”
Sero huffed. “Hell no.” Then, after a pause: “Maybe.”
You both laughed, the weight on your chest feeling just a little lighter.
“C’mon,” you finally said, nudging his arm.
“Let’s head back.”
As the two of you step back into the common room, you hear Kimiko’s voice cut through the air.
"Y'know, Katsuki, if you want to hold someone's hand, you could just ask me." She tilts her head, eyes glinting with mischief. "I wouldn’t make you work for it."
There's something in Bakugo’s eyes that tells you he's barely back his frustration. He takes a deep breath before responding.
"Could you stop that? It's annoying."
Kimiko’s expression falters just for a moment before deciding to continue. "Oh come, Katsuki, you know you like it." She reaches out to touch his arm once more, but he shifts away from her.
No, I don’t," he says, voice firm, final. "I never have."
Silence falls over the room. Kirishima shifts awkwardly, looking like he’s about to step in, but Bakugo isn’t done yet.
"I’ve just been putting up with it because I didn’t wanna deal with the drama." His voice is sharper now, frustration rolling off him. "But you’re annoying as hell, and I don’t like it, so stop."
The weight of his words hangs in the air.
You and Sero, still standing near the doorway, exchange a glance. This is... a lot.
Even Kaminari and Jirou, who had been hanging around earlier, had the good sense to disappear before things got worse.
Kimiko mutters something under her breath, too quiet for you to hear before pushing off the couch. She leaves without another word.
Mina sighs, rubbing her temples before grabbing Kirishima’s wrist. "Come on, Red, we should check on her."
Kirishima hesitates but follows. "That was kinda harsh, man," he mutters to Bakugo before leaving.
"Well, that was—" You turn to Sero, only to find him gone.
You huff a quiet laugh. Traitor.
Bakugo looks up at the sound, his usual scowl still in place. You hesitate for a second before walking over, dropping into the seat Kimiko had left empty.
Silence stretches between you both.
It’s not uncomfortable, though. Silence has always been your thing.
"You heard all that?" he finally mutters.
"Yeah..." You pick at your sleeve, not sure how else to respond.
There’s another pause before Bakugo exhales sharply, his voice lower when he speaks again.
"I don’t get why people think I’m into that flirty crap. It’s annoying." His gaze flickers toward you, then away just as quickly. "Not my thing."
"Then why did you tolerate it?" you ask.
You’ve spent months watching Kimiko flirt with him. At times, he barely reacted. Others he seemed to like it, so you assumed he was fine with it. But now? Now he’s snapping, like he’s had enough.
"’Cause damn Shitty Hair wanted me to," Bakugo mutters. "He said she was just trying to be friends with me, so I let it go. And she’s an okay sparring partner, I guess."
"Oh... I see..."
There’s something heavier in his voice now, something that goes beyond just Kimiko. You wait, and sure enough, he keeps going.
"After the war," he mutters, almost like he’s talking to himself, "everything felt… different."
He exhales sharply, frustrated. "I know I probably worried the hell outta everyone, almost dyin’ and all. I feel like, like I gotta make up for that somehow. Be better. Do shit right."
You swallow. "You did worry everyone," you admit softly. "Me, especially."
Bakugo clenches his jaw, his hands curling into fists in his lap. "I know, and I hate that," he mutters. "I hate knowing I made everyone go through that."
His gaze flickers up to meet yours, and there’s something raw within his expression.
"That’s why I let that shit slide. Why I put up with dumb crap like Kimiko’s flirting. ‘Cause it felt like… I dunno, something I should do."
You feel your heart tighten in your chest. "You don’t have to do anything you don’t want to, Bakugo."
"I know, and that's why you’re the only one I don’t gotta pretend around."
Your breath catches in your throat.
"You’ve always been my best friend, but—" he hesitates, just for a second, before pushing forward. "You’re different. You always have been."
Sero’s advice flashes through your head.
And suddenly, you feel like you’re on the edge of something terrifying.
Your hands clench into fists. "Bakugo..."
His eyes meet yours.
"Katsuki, idiot," he corrects automatically.
Your pulse races.
"Katsuki," you say, and his name feels heavier in your mouth than it ever has before.
His brows furrow slightly, like he can sense something shifting. "What?"
You take a breath.
And then, before fear can stop you, you say it.
"I’m in love with you."
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