Dong-ho is ranked number 1 in "Arena," an illegal gambling league for teens, but he steps down to prepare for college. However, the members of "Arena" don't want to lose their biggest money-maker, so they place a debt on his brother Dong-min. Dong-min literally fights against his debt, but when he gets hurt, Dong-ho decides to fight back.
Kim Do-gun
Baek Dong-hoKim Dae-han
Jung Min-chulJang Yong-hee
Jo Han-giYoon Kyung-ho
Baek Dong-minBang Sang-hyun
Lee Ha-junWang Woo-jin
Jang Woo-jinKim Si-yu
Kim Si-wooSeo Seung-hyun
Park Sang-ho