Friend

Yu Oh-seong

as

Joon-seok

Jang Dong-gun

as

Dong-soo

Seo Tae-hwa

as

Sang-taek

Jung Woon-taek

as

Jeong-ho

Kim Bo-kyung

as

Jin-sook

Gi Ju-bong

as

Mustache

Joo Hyun

as

Joon-seok's Fa...

Jeon Young-woon

as

Dong-soo's Fat...

Lee Jae-yong

as

Scar-Eye

Kim Hyeon-ji

as

Tall Woman

Yoo Seung-il

as

Child Joon-seok

Jeong Hee-ryong

as

Child Dong-soo

Kim Joon-beom

as

Child Sang-taek

Kim Seong-bok

as

Child Joong-ho

Kang Shin-il

as

Sang-taek's Fa...

Kwon Nam-hee

as

Sang-taek's Mo...

Park Nam-hee

as

Joon-seok's Mo...

Lee Eun-joo

as

Sin-ae

Kim Jung-tae

as

Doruko

Yoo Byeong-seok

as

Small Guy

Kim Gi-yong

as

Jjang-ga

Jung Ho-bin

as

Eun-gi

Yang Joong-kyu...

as

English Teacher

Kim Kwang-kyu

as

Math Teacher

Kim Gi-ho

as

Cowardly Gangs...

Hong Seok-yeon

as

Security Guard

Ahn Chang-gook

as

Man with Gold-...

Jo Yong-won

as

Beauty

Kim Hoon

as

Doruko's Hench...

Jo Soo-jin

as

Member of Rain...

Lee Se-na

as

Member of Rain...

Kim Hyun-sook

as

Member of 7 Pr...

Jang Gi-hoon

as

Small Guy's Mob

Kim Yeong-heon

as

Joon-seok's Dr...

Seo Byeong-do

as

Vice President

Kim Joon-hee

as

Trans

Park Hyo-jin

as

Theater Advert...

Park Yong-chan

as

Buckle Student

Im Ji-moon

as

Triangle Stude...

Kim Tae-won

as

Gangster from ...

Kim Seong-hwa

as

Arresting Poli...

Bae Won-yeong

as

MC Student

Lee Dong-wook

as

Student from t...

Kim Po

as

Mustache's Hen...

Ji Dae-han

as

Scar-Eye's Sha...

Cha Jin-ho

as

Bunting Student

Kim Ji-hoon-V

as

Weekly Duty St...

Kim Moon-bin

as

Student

Kim Jung-woon

as

Doruko's Young...

Kim Yun-tae

as

Dong-soo's Hen...

Chang Yun

as

Dong-soo's Hen...

Moon Woon-bong

as

Dong-soo's Hen...

Son Byung-hee

as

Dong-soo's Hen...

Yang Ji-woong

as

Waiter

Lee Kyeong-ha

as

Bar Girl

Hwang Joo-hyeon

as

Bar Customer

Choi So-i

as

Female Employee

Yoo Sang-seob

as

Jaws

Lee Ji-yeon

as

Female Employe...

Sun Ho-jin

as

Young Man with...

Kim Jae-hyeon

as

High School Boy

Oh Seung-chan

as

Court Prosecut...

Jeong Jong-seop

as

Court Lawyer

Park Chan-young

as

Judge

Kim Sung-nyeo

as

Bus Conductor

Jo Joon-baek

as

Employee at Co...