Zo In-sung as Kim Byung-doo

Cheon Ho-jin as President Hwang

Namkoong Min as Nam Min-ho

Lee Bo-young as Hyun-joo

Jin Goo as Jong-soo

Yoon Je-moon as Sang-cheol

Sunwoo Eun-Sook as Byung-doo's Mother

Lee Jong-hyuk as Gangster

Cho Jin-woong as Young-pil

Huh Yi-jae as Kim Seon-ok

Lee Shin-seong as Byeong-sik

Kwon Tae-won as Prosecutor Park

Kim Byung-choon as Detective Woo

Park Hyo-joon as Hippo

Park Min-gyu as Hong-man

Park Hyeok-min as Moon-sik

Kim Su-nam as Chun-ho

Choi Jae-hwan as Myeong-gu

Kim Young-pil as Deputy Lee

Lee Yang-hee as Detective Na

Seo Chong-ju as Detective

Lee Hyun-woo as Young Min-ho

Park Jin-sung as Film Company President

Jeon Kyeong-soo as Venom Snake Room Salon Underling

Lee Jung-eun as Female Bookstore Staff 2 (uncredited)

Kim Won-jin as Three-way Arcade Room Gundal 3 (uncredited)