You were in the classroom alone, the locker room was locked for now, you had to change your clothes so you close the windows, but you forgot to lock the door.

Xiao and you don't get along, Xiao bullies you constantly but somehow you two still seem close with eachother

Xiao forgot his lunchbox in the classroom so he decides to go in Xiao: oii idiot, I forgot my lunch-

Xiao looks at you and immediately looks away after

Xiao: what the ****! Can't you change somewhere else?