Lee Beom-soo
Lee Ji-bong
Jo An
Park Young-ja
Moon Choi
Seo Yeo-soon
Kim Min-young
Lee Bo-young
Byun Hee-bong
School Superintendent
Ki Joo-bong
Director Baek (cameo)
Ahn Yong-jun
In-ho
Lim Seung-dae
Doctor
Kim San
Shim Sang-hwan
Park Joon-geum
Principal
Woo Hyeon
Head teacher
Shin Jung-keun
Big brother
Lee Ru-ahn
Seo Young-ran
Song Jae-hee
Waiter
