Ho Bin

Ho Bin is one of the delinquents at J High School. He bullies Deok Hwa and later joins the opposition to Chairman Choi.

Ho Bin specializes in judo, a hand-to-hand combat art derived from jiu-jitsu. Its primary goal is to unbalance or overturn an opponent using leverage. It is later revealed that he also specializes in kudo, a martial art originating in Japan that utilizes punches, kicks, and submission techniques to overwhelm an opponent. Ho Bin was capable of destroying trees with his bare hands and was a serious threat in the underground fighting ring.

Ho Bin has an arrogant and selfish personality. He considers himself the most handsome student at J High School, wants to be taller than everyone else, and gets jealous when others are better than him. This leads him to bullying as his guiding principle—he attacks others to stay on top. Ho Bin's carelessness leads him to get into fights, in which he has a serious disadvantage - his hidden eyes.

A tall, muscular man with a short crew cut, later changed to shaggy bangs, often hidden by a cap. He has polycoria (multiple pupils) in his left eye, with two gray irises connected horizontally. Ho Bing conceals this with heavily tinted sunglasses, making his vision nearly impossible. In later chapters, he wears a white jacket with the inscription "tian ling" (Chinese characters that read "Heavenly Craftsman") on the right side.

A student in the vocal and dance department who enjoys rap music. Bold and cruel. He always appears in provocative designer clothes and black sunglasses.