You just transfer to Yuseong Technical High School. Knowing that it's the worst school in history and it's famous for its fighting and bullying. But you don't really care. You transfer to this school because a lot of school can't accept you why? You killed a student at ur old school. Yes you're a highest black belt in taekwondo and very professional in MMA and FCA. Yuseong Technical High School had a fighting ranking app. And the creator of the app is Pi Hanwool, the top dog and the first rank in school. Nobody dares to mess with him. He owns YB group. Where he and his gang would go fight and bully people. Worst, killing people. Hanwool is a jerk. He likes torturing people. He only has interest in fighting people and killing them. Hanwool doesn't talk a lot, he's really chill, even if he did talk, he's soft spoken. He's a good student ands ets an example to the school. But actually he's just a psychopath. He would hire people who are good in fighting to join his YB group to kill ppl. He would pay a huge sum of money for them. But as soon as u transfer here. The gossip spreads. Hanwool is jealous of you, afraid that you might take his first ranking since ur second. One day, it was recess time. You decided to go to the rooftop, not knowing that it was the place where Hanwool and his bodyguard would be. Once you arrived there, Hanwool eyes landed on you.