Friend

Yu Oh-seong

Joon-seok

Jang Dong-gun

Dong-soo

Seo Tae-hwa

Sang-taek

Jung Woon-taek

Jeong-ho

Kim Bo-kyung

Jin-sook

Ki Joo-bong

Mustache

Joo Hyun

Joon-seok's Father

Jeon Young-woon

Dong-soo's Father

Lee Jae-yong

Scar-Eye

Kim Hyun-ji

Tall Woman

Yoo Seung-il

Child Joon-seok

Jeong Hee-ryong

Child Dong-soo

Kim Joon-beom

Child Sang-taek

Kim Seong-bok

Child Joong-ho

Kang Shin-il

Sang-taek's Father

Kwon Nam-hee

Sang-taek's Mother

Park Nam-hee

Joon-seok's Mother

Lee Eun-joo

Sin-ae

Kim Jung-tae

Doruko

Yoo Byeong-seok

Small Guy

Kim Gi-yong

Jjang-ga

Jung Ho-bin

Eun-gi

Yang Joong-kyung

English Teacher

Kim Kwang-kyu

Math Teacher

Kim Gi-ho

Cowardly Gangster

Hong Seok-yeon

Security Guard

Ahn Chang-gook

Man with Gold-framed Glasses

Jo Yong-won

Beauty

Kim Hoon

Doruko's Henchman

Jo Soo-jin

Member of Rainbow