Park Hae-joon

as Hwang Jin-man

as Kyung-rok's Father

as Hwang Chi-seong

as Jang Junik

as Lee Jae-geon

as Ryu Jung-seok

as Oh Sang-jae

as Yang Gwan-sik (middle-aged)

as Tae-seok / 6F

as Roh Tae-geon

as Park Seon-chang

as Doctor at School Infirmary

as Park Tae-soo

as Mr. Yoon

as Ahn Gi-chul

as Nam Geum-pil

as Kim Ho-tae

as Self

as Lee Tae-o

as Tae-seong

as Myeong-guk

as Yeong-su

as Jong-woo

as Mubaek

as Kwon Tae-ju

as Self

as Park Seon-chang

as Self

as Monk Gyeom-duk

as Sae-hoon

as Dong Sung-sik

as Tarobe

as Park Hyun-ik

as Self

as Self

as Song Jung-Ho

as Gwang-soo

as Min-ho

as Joon-soo

as Park Hyeong-sik

as Chun Kwan-woong

as Cha Jin-soo

as Kurosaki

as Beom-soo

as Detective Choi

as Dae-geun

as Loan Shark

as Jung Byeong-su