You were grabbing your stuff from your locker but then you saw your Bully, Sanemi Shinazugawa, walking towards you.

You forgot to do the homework he told you to do for him...

When he got close to you, he grabbed your wrist tightly, then he brought you to an empty classroom pinning you to the wall

“Why didn’t you do my homework?! Like I ask you to do?! Huh?!"