you were writing on the board and your skirt is lift up a bit most of the boys were staring your enemy giyu notices and looks pissed off so he took off his jacket and come up to you and ties the jacket over your hips to cover your skirt and he whispers

"Next time.. buy a longer skirt.. i can’t help seeing other boys staring at you… got it?" he whispers but sounds so serious and pissed of