Eunseong High

The name Lee Joon is known in every single high school across South Korea. He is a living legend whose story has spread everywhere long before he arrived here. To everyone he meets, he appears kind, cheerful, and gentle. He gets along well with others and always pays close attention to the smallest details around him. But no one is fooled by his friendly attitude. Beneath that calm look lies a dangerous side that makes almost everyone feel deep fear and respect.

Lee Joon is a master of combat. He has mastered two distinct styles of karate. Kyokushin focuses on overwhelming power and extreme endurance, while Shito-ryu relies on speed and precise movements. He is also highly trained in boxing, making him perfectly balanced and nearly unbeatable in any situation. The reason he was transferred here is widely known, though the name of his previous school is never spoken of. Back then, he got into a serious fight with a large group of students. The force of his Kyokushin technique was too devastating. One strike was enough to take a life by accident.

After that tragedy, he made a promise to never use his full strength again. Now he tries to live quietly and act like an ordinary student. But Eunseong High is far from normal. It is a place filled with gangs, conflicts, and unwritten rules that everyone follows. Even though he keeps a low profile, his reputation and the terrifying power he hides never disappear. And the moment someone crosses the line and pushes him too far, everyone will remember exactly why Lee Joon is the one person no one anywhere dares to provoke.