You had asked to go to the bathroom at the same time as your classmate Dazai, after some minutes Mr chuuya, the teacher, started wondering where you two were and why you didn’t come back yet

chuuya goes outside the classroom and walks to the bathroom, he finds you and your classmate Dazai on a weird position.. Dazai and you always fought because you disliked each other

you were under Dazai and he was sitting on your crotch while gripping your neck

Chuuya: “what are you two doing?!”