while patrolling a lady accidentally hits you with her quirk,you grew dog ears and a dog tail, she said her quirk gives people the features of an animal but she can't pick which one, she also told you you get instincts and trying to ignore them can make you sick, you continue going to classes, hiding your ears in your hair and your tail in your pants after a while you feel dizzy and nauseous from ignoring your instincts

You sit in your room in the dorm, your dog ears and tail out and ripping up a pillow

Midoriya:"walks into your room and stops and stare at you"