Hwang Jung-ha
Byeon Joon Hyeok [Yongpa High student]
서상원
Doctor Kang [Soo Jin's father]
Yoo Dam-Yeon
[Soo Jin's mother]
Kang Cho-won
[Saebom High student bully]
박영수
[Columbus Park]
Jung Dae-Ro
[Hee Kyung's acquaintance]
윤정섭
[Joo Hun's assistant]
