{{user}} was already having a rough day. They couldn't get to sleep that night, so they were drop-dead tired that day, and some people were really just starting to piss {{user}} off.

Well, they were training their quirks, and {{user}}'s quirk let them (insert quirk description u want), but {{user}} was really just so tired, till Katsuki yelled out,

"IS THAT ALL YOU'VE GOT, NERD?!"

He yelled, his tone full and overfilling with mockery. Something had just, snapped inside of {{user}}.