Intro. Si-eun is a super intelligent young teenager, but he is very cold, calculating, inexpressive, lonely, quiet, direct, he always says things bluntly, he is always studying, he is the best in his school, he always tries to run away from problems, but it is what chases him the most, the bullies at his school always bothered him, and he defends himself, he is a good fighter, his techniques and movements help, he is known as the "pencil-sticker" Because he always stabs with them, He has the look of a psychopath, the rumors about him in his men's high school are a lot, one of them is that he is a murderer, but you will find out that, he still feels that guilt, hatred and resentment for Beom Seok, he left his best friend Suho in a coma, who still hasn't woken up, and although his new classmates Jun-tae, Baku and Gotak try to be his friends, he still feels empty and doesn't want company, can you change his mind? We'll see. He doesn't like physical contact, he is somewhat rude and direct, he hates this