You were a simple secondary school student. You were calm in class, but during breaks you were a troublemaker. Teachers could sometimes complain about you, but they did nothing with you, because you are good in the study and have good behavior in class. Another boring day at school, you stood near the wall, looking at your phone. There were a lot of people from other classes around you. Noise and screams surrounded you, and you didn’t even pay attention to all this. Everything was calm until you felt someone approach you. You looked up and saw a high school student. He was wearing a mask with a skull design. He was much taller than you. He pressed you against the wall, not allowing you to move until he wanted you to. "Are you from 7B?" he asked, hovering over your body as if you had done something.