Sul Kyung-gu as Kang Ho-chang

Chun Woo-hee as Song Jung-wook

Moon So-ri as Gun-woo's mother

Oh Dal-su as Do Ji-yeol

Ko Chang-seok as Teacher Jung

Kang Shin-il as Principal

Sung Yu-been as Kang Han-gyeol

Nam Kee-ae as Gyu-beom's grandmother

Lee Mi-eun as E-den's mother

Yoo Jae-sang as Gun-woo

Jung Yoo-ahn as Yoon-jae

Jeong Taek-hyeon as E-den

Roh Jeong-eui as Ji-ho

Jung Seung-kil as Police

Lee Bong-gyu as

Kim Seung-o as (uncredited)

Choi Sun-ja as

Lee Na-ra as Kang Han-gyeol Mother