Fluff! Angry boom boom man!
Gender neutral reader

[accidentally stole a bit of Mirio's quirk :/ to be fair I didn't know about him when I started writing this!]

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It's only been an hour since getting acrylic claw-like nails and already you couldn't imagine not having them.

Mina and you had initially gone to the mall to use a couple almost expired laser tag passes Todoroki had, for some reason. 

But between  just how sporadic you were feeling finally being off campus, and Mina's spontaneous spirit, you both dropped a good chunk of change for a stupid impulsive choice that was only encouraged. 

You'd gotten a sharp, glossy white set of acrylic nails. They were absolutely beautiful and filed to an almost dagger-like point. You couldn't help it, the idea of feeling like Catwoman was thrilling. Mina, on the other hand, had went for a matte shade of pink that matched her skin tone perfectly with a round tip. They made her fingers look elongating to an unnerving length 'for the meme' as she put it. 

Unfortunately for you both, you did this right before your laser tag matches. You being new to having these types of nails greatly hindered your ability to navigate a laser gun along with the lingering fear over your head that the nails could get ripped off in your surroundings.

But the main reason you both lost so badly was the fact Mina and you kept doing dumb shit with them like stopping just to wiggle your nails against each others, squishing and pinching each others faces with only the nail tips, just generally not taking the game seriously. It didn't help that a few 12 year olds had made you both their targets either.

So safe to say neither of you even got on the score score board. Mina said Mr. Aizawa would be disappointed at such poor focus in a fight.

It was a good afternoon to say the least. Thanking Todoroki was the first thing on both your lists when you got back to UA.

The sun was setting, casting a nice, warm glow on everything. Cricket songs wove into the evening air as the pair of friends walked up the front steps of 3-A dorms, engrossed in chatter and laughter. Mina opened the door for you both and lead you towards the common area, buzzing while you both took up the dorm corridor, absentmindedly dragging your nails against the walls. 

"Okay, but, I'm just saying you could've definitely beaten Sen." Mina said, closing her eyes and tiling her head, her fluffy cotton candy hair piled towards you. 

You shook your head with an amused smile. "Mina, he won that fight fair and square. I couldn't land a single hit on the guy!"

She whined, closing her big black eyes. "Yeah.." Her eyes opened once more with her bubbly energy spilling over. "but, if you could like, I don't know, choose only a few parts of yourself to phase then you probably could've gotten closer and kicked his butt!" She exclaimed, kicking the air.

On the brink of laughter, you shot her a crooked smile. "You sound like Midoriya."

Rounding the corner you both had made it to the common area that was littered with a few of the 1-A students. You knew most of them at this point thanks to your frequent visits; They were tight-knit group much like class 3-B, and you counted yourself lucky enough to understand and experience both class relationships behind the fighting, costumes and competition.

Tokoyami, Yaoyorozu and Todoroki lifted their heads from the corner study table in mild curiosity as you and Mina strolled in before looking back down to their mounds of homework strewn about. 

You paid little mind to them once you caught sight of one messy head of ash blonde hair on the couch. His posture shouted his disinterest in whatever he was stuck watching with Kirishima. The redhead head was sitting on the opposite side of the couch to Bakugou, and was much more invested in what was happening on the screen.

In a moment of pure brilliance you started to stalk up behind the unsuspecting blonde. Kirishima noticed you out of his peripheral vision, but remained casual, not even reacting aside from a tiny smirk.

You activated your quirk, making your footfalls undetectable as you crouched just behind his head that was lulled in his palm. Slowly you phased your clawed hands through the back of couch, inch by inch.

Everyone seemed hyper aware of what you were doing, not daring to turn their full attention to watch, in fear of possibly alerting the explosive boy.

Suddenly you shoved your hands completely through Katsuki's chest, wiggling and writhing your long white nails all around in a way that made it look alien. "Blulululululu~!" You uttered into his ear softly in a high, silly tone.

"THE FUCK?!" He yelled in surprise, jumping to his feet with his hands gripping at his completely fine chest in panic.

At this point you and Mina started laughing hysterically. However the difference between you and Mina when Kacchan whips his gaze towards you laughing pair of idiots, was Mina nervously shrinking away, attempting to hide her now stifled laughter. 

As for you, he literally couldn't lay a finger on you.

"You ghosty fuck!" He seethed before charging towards you, jumping over the backside of the couch. 

You weren't worried though, as his tackle slipped right through you harmlessly, forcing an even more aggressive bark of laughter out of your tightening lungs.

You turned to Todoroki who was watching the entire debacle with keen eyes that flicked from Bakugou to you. "Hey, I just wanted to thank you for those laser tag passes. Mina and I had a super fun time!" You thanked with an appreciative tone despite the lasting laughter playing on your lips.

He gave a wordless nod as a flit of amusement sparked in his eyes for just a moment as your angry boyfriend, currently stumbling forward with his arms frantically pinwheeling to gain his balance.

Katsuki's fury seemed to have immeasurable heights as he wheeled back on you. His finger tips sparking and spitting threateningly. "DON'T IGNORE ME!!"

All of 3-A found you fucking with the poor guy fairly satisfying, but only when they were at a safe distance, and at the moment they were not feeling very secure.

That fiery temper of his flared wildly in his darkening crimson eyes. His forearms were popping small explosions along the skin and his jaw was set in a tight grit.

Kirishima jumped up and took action, swiftly standing in front of his poor tempered friend, attempting to talk him down from destroying school property.

Tokoyami took a deep, annoyed sigh and stood to his feet, clamping his book shut. His sharp eyes landed to you and Katsuki with an apathetic stare. "I'll be in my dormitory." His eyes soften only slightly as he looked to his study partners. "Todoroki, Yaoyorozu, you are both welcome to join me if you wish to continue studying in peace." With no longer than a moments notice he walked away towards his room. 

Yaoyorozu didn't need to be told twice as she began collecting her notes into a neat pile and placing them in her book, tailing closely behind the bird boy. 

Todoroki slowly stood, as if he were about to pack up too. "I trust you will be able to handle this?" 

"What'd you say you half and half bastard?!" Katsuki snapped, attempting to push through a now completely rock solid Kirishima. "Don't talk about me like I'm not here!!"

Guilt bubbled up in your stomach like a slow, hot bubble of tar. You truly never really thought about the possible danger Katsuki posed to others when an opportunity to mess with him comes up.

With nothing but a confident nod in response, Todoroki packed up his stuff and casually walked away, riling Katsuki up even more. "DON'T WALK AWAY FROM ME YOU COWARD!!" He roared, swiftly sidestepping Kiri, smashing his shoulder against the red head's much more sturdy one.

Quickly, you stood in his path towards the two toned hero.

He must not have been expecting you to be physically present by the way he barrelled into you.

Or maybe he did, hard to tell.

You had to take a few steps back to avoid being completely trampled, as your hands gripped his arms in order to keep your body upright. 

"Whoa whoa! Hey, slow down there bucko." You cried out, pushing against this force of nature.

He barely even spared you glance as his murderous eyes stayed strained on Todoroki. 

You knew that when he was like this he wouldn't let anything blow over, which left you with few options that didn't include making him even angrier.

"Katsuki! Katsuki I'm sorry." You repeated hurriedly while trying not to laugh, suppressing the amused expressions trying to burst forth.

His eyes stayed trained forward, completely ignoring you while pushing forward against your seemingly ineffective efforts to stop him. 

"Kiri, can you give us a second?" You asked hurriedly.

The redhead nodded with a thumbs up. "Okay, Good luck Y/n!"

Katsuki stopped in his tracks at Kirishima's words. You could feel his body temperature rise as he stared at his friend with a fire raging through his body. "THAT'S L/N TO YOU SHITTY HAIR!!" Bakugou roared, tiny explosions littering his body.

"Uhh! I mean L/n!" Kirishima laughed awkwardly, backing away. "Haha! I'm not the type to break anyone up I swear!" He promised, before promptly dipping. 

And like an angry Pomeranian, he started to run after Kiri. "GET BACK HERE YOU—ACK!!"

You were not about to let him kill one of the few people who could stand him. So you wove your fingers through his hair on the top of his head and clamped down on a fistful of his greasy feeling hair, planting your feet firmly in place.

"AHhK!! WHAT THE HELL YOU CRAZY TURD?!" He yelled, his head tilted back to your height as to not cause any more yanking. "Let GO!" He protested, trying to grab at you hand.

But just as his hand reached up you pulled harder. "Katsuki! Stop it!"

He grunted in pain and glared up at you. His breath was heavy from the ever present anger still rushing through his hot veins. "Y/n. Let go." His voice was quieter, but still just as tense.

"Not until you calm down." You countered. 

"How the hell do you expect me to calm down when you're yanking on my fucking scalp?!?" He questioned, irritation being thrown into the mix of emotions he was stewing in. 

You pursed your lips. He had a point. But if you let go, he'd go on another rampage. 

Still, you didn't exactly want to keep him this pissed off. It was an actual hazard for literally everyone. 

"Okay! Okay..." You said in the calmest way you could. 

You stared at his bright hair tangled on your hand, finally getting an idea. 

"Just... Relax, I guess?" You said making him turn fully towards you as you brought your other hand up to his head.

He continued to glare. "I swear to god if you do anything else that pisses me off I'm beating your ass into... into..." 

His words fell off as you let your one hand hand glide through his hair, gently running your nails along his scalp.

The fire that engulfed him became nothing more than a swimming flame under a kettle in less than a few moments. His body was still as he tried to understand what was happening. 

You smiled at him as the hand that held him captive slowly released its hold, then carefully ran back through his hair.

His shoulders resisted for only a moment until they slumped a little and the intensity in his frown faded and caused his eyes to droop ever so slightly.

"Uh oh." You stayed with worried, wide eyes. Stopping your hands just behind his ears with your thumbs in front of his sideburns.

His eyes widened confused.

"Are you enjoying this?" You teased, chuckling lightly with a tilted head.

He grunted, bringing his eyebrows together in an annoyed frown. "Shut up." With that he closed his eyes. "And keep going."

You couldn't help the smile that crossed your face as you raked your fingers up along the sides of his skull, watching him melt into your tender touch.

After a few minutes he grabbed your wrist and sat you both down on the couch. He eagerly laid down with his head in your lap, to which you continued your petting, lulling him into a calm, sedated state.

"You're so precious." You hummed, planting a kiss on the corner of his lips.

"Shhh." He grumbled with a frown. But the pink that washed across his face was all you needed.