Lee Byung-hun

as Seo In-woo

Lee Eun-ju

as In Tae-hee

Yeo Hyun-soo

as Im Hyun-bin

Hong Soo-hyun

as Yeo Hye-joo

Namkoong Min

as Kim Chul-sung

Lee Jae-yong

as Kwak Yoon-jung

Im Jae-geun

as Kim Jin-tae

Lee Beom-soo

as Lee Dae-geun

Kim Min-jae

as Kim Min-jae

Jang Suk-won

as Cho Jae-Il

Jeon Mi-seon

as In-woo's Wife

Ki Joo-bong

as Director of Student Affairs

Park Cheol-min

as P.E. Teacher

Kim Kap-soo

as Professor of Sculpture

Oh Ji-hye

as Substitute Teacher of Korean

Woo Jung-kook

as Courier

Lee Seok-ku

as Supermarket Owner

Kim Jung-young

as English Teacher

Hwang Hyo-eun

as Sculpture Schoolgirl

Lee Soo-young

as Class President