Welcome to more Lonesome Practicalism! Now I ask that you sit back, relax, and enjoy the show!

It was the first time Katsuki saw his hand glow.

Shoichi, well, Izuku had tripped yet again, forgetting that tiny limbs were a thing. In doing so, he scraped his knee bad enough to scare his mom.

That is, if she knew about it.

Everytime, without fail, they were comforting to see, especially in a world where everything seemed to be turned on its head. They cauterized and closed the wound effectively, just as he expected. It wasn't the first time he used his flames, but it was the first he had an audience.

"Woah, that's so cool! Did you get your Quirk already?"

"Uhhh…" What, what does he say? Yes? Would this even classify as a Quirk? "I don't know, just that it heals me. I call them Sun Flames, aren't they cool?" Ironic, considering they're fire. Though does that count since it's not really temperature based…? He'd have to think on that later.

"Sun Flames? Sounds lame. Can I touch?" At Shoichi's shrug, he poked the fire emanating from his hand. "Huh. It's not hot."

"They are supposed to heal, you know. And I'm not trying to hurt you anyways!" He then proceeded to set Katsuki's hair on fire. It looked pretty, if he said so himself.

Interesting experiment. "Wasn't sure if it'd burn your hair or not. Is it…?" Oh! There was a significant length of hair added! "I can speed up the growth of the protein cells in your scalp! Of course!" Maybe this was getting slightly out of hand. After all, Kacchan wasn't able to put his hair up in a ponytail before this.

"Thanks. My head was killing me." Shoichi paused, his curiosity now tinged with worry. "Something happen?"

"Mom was just angry again, the usual. I'm thinking of calling her a hag." Katsuki shrugged it off, but Shoichi closed his hand tightly in a fist, before breathing out and slowly letting it go.

"What exactly were you feeling? With your head, I mean." No need to let emotions run their course, not right now at least. Kacchan didn't need that.

"I think it was kinda like… my brain felt too big for my skull. Like it had to get out. But your Quirk helped a lot!" He cheered, not noticing Shoichi wasn't happy.

Sounds like edema. Which didn't help at all, any brain injury can lead to that…! The brain feeling too big for his skull was probably the swelling, causing it to inflate and have the brain press up against the cranium.

What would have happened if Shoichi wasn't here?

"Stop ignoring me!"

He can probably stop his sun flames now, Kacchan's hair was super long. But before that…

"Do you have any other injuries?"

Katsuki blinked, cocking his head while he thought. "Couple bruises, but they'll be okay in a little while."

Yup, emphasis on little. Shoichi immediately let his flames search for them, focusing on any pain first before forcing the surrounding cells to hurry.

Then promptly passed out.

Maybe he should practice on using his flames more…?

Please let me know what you think, and I hope you enjoyed!

~ TheAngelicPyro