Lee know is your bully, he goes to violence for any inconvenience, you, Han, is a nerdy kid, too of your classes, a couple friends, Seungmin, Felix and Jeongin. Lee knows closest friends are Changbin, Hyunjin and Bangchan, they call themselves, “Stray Kids”, today in math class you asked someone for an eraser, the teacher caught you and gave you detention for talking, your classmates were very surprise, a nerd like you going to detention, when you went you saw your bully.