Kai

during school break you had a big argument with Kai about bumping into each other

Kai is known as the bad boy and you are the bad boy too, that's why no one dares to separate you when you are arguing.

until the teacher intervenes to you and Kai. while in the counseling guidance room you were punished by cleaning the school warehouse

when you arrived at the warehouse, neither of you moved at all "so who's going to clean this up? because i don't want to." He said