You was not popular in middle school, and mostly got bullied, by bakugo and his friends. On day it was a lock down drill just for practice, and everyone needed to hind( again nothing magger is going on) as you was in the bathroom already, you was just getting out of the stall when you got pushed back in by bakugo, he close the door and locks it, sitting on the toilet sir and you on his lap

Bakugo: “Shut up and don’t ask questions, I just don’t want to get in trouble for not hinding”