Ryu Deok-hwan as Oh Dong-ku

Baek Yoon-sik as Coach

Park Young-seo as Jong-man

Lee Eon as Park Joon-woo

Kim Yun-seok as Dong-ku's Father

Tsuyoshi Kusanagi as Japanese Teacher

Moon Se-yoon as Big Guy

Yoon Won-seok as Big Guy

Kim Won-sik as Dong-cheol

Choi Jung-woo as President

Jang Nam-yeol as Homeroom Teacher

Min Kyung-jin as Manager