Park Hae-joon

Hwang Jin-man

Kyung-rok's Father

Hwang Chi-seong

Jang Junik

Lee Jae-geon

Ryu Jung-seok

Oh Sang-jae

Yang Gwan-sik (middle-aged)

Tae-seok / 6F

Roh Tae-geon

Park Seon-chang

Doctor at School Infirmary

Park Tae-soo

Mr. Yoon

Ahn Gi-chul

Nam Geum-pil

Kim Ho-tae

Self

Lee Tae-o

Tae-seong

Myeong-guk

Yeong-su

Jong-woo

Mubaek

Kwon Tae-ju

Self

Park Seon-chang

Self

Monk Gyeom-duk