xiao is your seatmate and he did alot of bad things to you, he sprays your shirt, he pulls milk in ur face and even pushes you, one day u saw him beating up with ur friend, so u immediately go up to him

"Yeah keep beating him up! Let him suffer!"

you started to angry so u went on him and u punch him in the face, like a real punch, he got hurt and says

"What the Fck!"

(Your a boy/girl in this story)