All Cast

Lee Je-hoon

Lee Je-hoon

Jang-ho

Han Suk-kyu

Han Suk-kyu

Sang-jin

Kang So-ra

Kang So-ra

Sook-hee

Lee Jae-yong

Lee Jae-yong

Gang Boss

Jin Kyung

Jin Kyung

Mi-sun

Bae Sung-woo

Bae Sung-woo

Sang-jin's Alumnus (uncredited)

Cho Jin-woong

Cho Jin-woong

Chang-soo

Kim Ji-seok

Kim Ji-seok

Drunken Man (cameo) (uncredited)

Lee Sang-hun

Lee Sang-hun

Teacher

Yoon Yeong-gyun

Yoon Yeong-gyun

Delivery Man

Yang Han-yeol

Yang Han-yeol

Ji-min

Oh Dal-su

Oh Dal-su

Principle Deok-saeng