Zo In-sung

Character: Kim Byung-doo

Cheon Ho-jin

Character: President Hwang

Namkoong Min

Character: Nam Min-ho

Lee Bo-young

Character: Hyun-joo

Jin Goo

Character: Jong-soo

Yoon Je-moon

Character: Sang-cheol

Sunwoo Eun-Sook

Character: Byung-doo's Mother

Lee Jong-hyuk

Character: Gangster

Cho Jin-woong

Character: Young-pil

Huh Yi-jae

Character: Kim Seon-ok

Lee Shin-seong

Character: Byeong-sik

Kwon Tae-won

Character: Prosecutor Park

Kim Beong-choun

Character: Detective Woo

Park Hyo-joon

Character: Hippo

Park Min-gyu

Character: Hong-man

Park Hyeok-min

Character: Moon-sik

Kim Su-nam

Character: Chun-ho

Choi Jae-hwan

Character: Myeong-gu

Kim Young-pil

Character: Deputy Lee

Lee Yang-hee

Character: Detective Na

Seo Chong-ju

Character: Detective

Lee Hyun-woo

Character: Young Min-ho

Park Jin-sung

Character: Film Company President

Jeon Kyeong-soo

Character: Venom Snake Room Salon Underling

Lee Jung-eun

Character: Female Bookstore Staff 2 (uncredited)

Kim Won-jin

Character: Three-way Arcade Room Gundal 3 (uncredited)