chained : yan ! bnha + kny x kny ! reader

seventeen , costume

Y/n blinked as Toshinori came bursting through the door in a costume. A stupid and tacky one, at that.

Kids ooed and awed at the man, but Y/n watched the scene boredly as he gave some speech, "But, one of the keys of being a hero is..." He pointed dramatically to the wall as briefcases appeared out of them, "Looking good! These were based off of your quirk registration forms and the request you sent in before school started!"

Y/n blinked, did they do one? They couldn't remember it. They got up and found the case with their seat number, 21. All of the kids shuffled out, leaving only Y/n and All Might.

Y/n sighed, "Did you fill out the form for me?" They asked, giving him a tired look.

All Might nodded, "Indeed! You were out, so I decided to help you!" His bright smile practically blinked Y/n.

"Whatever," Y/n tsk'ed, "Where am I s'posed to change?"

All Might pointed out the door, "In the Staff Room!"

Y/n hummed, "Bye, Toshinori," They waved, leaving the room quietly.

The staff room was just across from the heroics room, so Y/n simply waltzed in. Everyone seemed to be doing something, so it was mostly empty, besides their home room teacher.

Y/n glanced at him, walking over to the quick change room. Undressing, they glanced at their mostly unscathed body.

Mostly.

Unlike full demons, any hit from a nichirin blade caused permanent damage. While their face, arms, and legs were clean, there was a large scar going from their neck to their chest, and one going through their waist. They were healed, but scarred horribly. They were sure Toshinori knew about at least the neck one, but had never spoken about it.

Sighing, Y/n opened the briefcase. Inside was a red white and blue bodysuit accompanied by a yellow cape. Y/n, blinked. There was no way they were putting that thing on. It was ugly, very very ugly.

Stuffing the suit back into their case, Y/n changed back into their sweater and shorts. Sparing one more glance at the quick change room, they walked out of it with the briefcase in hand.

Aizawa looked at them curiously, which they promptly ignored. Y/n hated liars, and he lied about a lot of things yesterday. They stared at the briefcase, they couldn't just not wear a costume, or Tenya would give them some boring lecture or whatever.

Y/n clicked their tongue, looking for the exit to the school. After a few turns, they had found it. Walking out, they spotted a few reporters, who promptly bombarded them.

"Is that a student?!"

"Is All Might your teacher?!"

"What's U.A like?!"

They asked, but as soon as Y/n shrugged, the slayer disappeared. In reality, they had jumped into the air, though specifics were never really Y/n's thing. Y/n landed on a tree, then a building, until they were building hopping to their and Toshinori's home.

Since they were going as fast as they could without breaking anything, they had made it there in a minute or two. Sliding down a building, they landed beside the home, and walked in.

As soon as they did, they sensed a lingering presence. They shrugged it off as some berserk fan, and walked to their own room. The presence there was the strongest. Whatever it was had left hours earlier, but their aura was so strong it lingered for longer.

It had to be a demon. A strong one as well. They couldn't pinpoint if they knew them or not from the aura, though, as they were gone. Y/n suspected it was a moon, but not Muzan himself. As much as Y/n wanted to track the demon, they would have to wait until night The demon had used teleportation of some kind to get in and out of the home, so there was no use in trying. For now, Y/n would have to theorize and wait.

Y/n opened the closet to their room, finding their slayer uniform, haori, and blade. The demon's aura was especially pungent on them. Y/n wrinkled their nose in disgust, realizing it was also prevalent in their drawers and on their bed.

Taking the uniform, Y/n inspected it for any foul play, before putting it on. It was the classic uniform, with pants and a long sleeved shirt. Y/n grabbed their crimson haori, slipping it on before glancing at their nichirin sword.

All Might had said no unauthorized support gear was allowed, but it didn't feel right not wearing it. Y/n grabbed it hesitantly. It was a mostly black sword, with the sharp part having a fade of red to orange, reminiscent of fire. They sheathed it, before walking out of the room, but not before glancing at it once more.

They'd find that demon, they had to. They craved the demon, craved to fight it, and be challenged. God, they wanted the demon so bad. But did they want it more than it wanted them?

"I'll see you soon, my white lotus..!"