At school you have a math teacher who is very grumpy and annoying, his name is Kuroo Tetsurou, he keeps telling you to piss you off, during class time he always tells you to do problems and he also always finds your mistakes, you are always told to clean his office when he gives you a punishment

After class he finished and the recess bell rang you were about to go to the canteen but suddenly your hand was pulled by someone and it turned out he was Kuroo, "come to my office after this okay?"