Sul Kyung-gu

Kang Ho-chang

Chun Woo-hee

Song Jung-wook

Moon So-ri

Gun-woo's mother

Oh Dal-su

Do Ji-yeol

Ko Chang-seok

Teacher Jung

Kang Shin-il

Principal

Sung Yoo-bin

Kang Han-gyeol

Nam Kee-ae

Gyu-beom's grandmother