Choi Moo-seong
— Seong-cheol
Kim Yeo-jin
— Mi-sook
성유빈
— Ki-hyeon
김경익
— Hyeon-kyu
문영동
— Chief Paperhanger
이화룡
— Homeroom Teacher
Park Chan
— Jun-young
Kim Do-young
— Jun-young's Mother
Lee Da-wit
— Eun-chan
Ryu Ui-hyun
— Jeong-seok
Jeong Hoi-joong
— Han-seok
Kim Sang-woo
— Ji-hong
이민재
— Seong-woo
정태성
— Ho-seong
공상아
— Ji-sook
Seong Yeol-seok
— Public Servant
김추월
— Principal
Park Joo-young
— Worker 1
Son Seok-bae
— Worker 2
박영진
— Worker 3
Baek Jeong-jip
— Worker 4
Kim Kwang-sik
— President Seong
Song Sook-hee
— President Seong's Wife
Park Seong-yeon
— Hyeon-kyu's Wife
엄옥란
— President Kim's Wife
최요한
— Ho-seong's Father
윤부진
— Ji-hong's Mother
이승훈
— Ji-hong's Father
김재만
— Seong-woo's Father
Kim Gi-song
— Detective Kim