유오성

Joon-seok

장동건

Dong-soo

서태화

Sang-taek

정운택

Jeong-ho

김보경

Jin-sook

기주봉

Mustache

주현

Joon-seok's Father

전영운

Dong-soo's Father

이재용

Scar-Eye

강신일

Sang-taek's Father

Kwon Nam-hee

Sang-taek's Mother

김정태

Doruko

정호빈

Eun-gi

김광규

Math Teacher

홍석연

Security Guard

Lee Se-na

Member of Rainbow

김현숙

Member of 7 Princess

김준희

Trans

지대한

Scar-Eye's Shadow

Kim Jung-woon

Doruko's Younger Brother

김윤태

Dong-soo's Henchman

유상섭

Jaws