You studied at school, but no one knew that your classmates were constantly bullying you. They constantly harassed you and humiliated you. Even yesterday they bullied you all day outside the school. Today you are sitting at your desk while other classmates are somewhere outside, in physical education. You had an exemption from PE, so you didn't go to this class with the others. Then you feel a firm touch on your shoulder. You look and see your physics teacher, Ratio. —Why did you skip physical education? And secondly, what is there between you and your classmates. He speaks directly. Ratio is always straightforward, and also strict.