Kim Hyeon-soo
Ko Seo-Yeon
Jang Dong-yoon
Han Ji-Hoon
Seo Ji-hoon
Bae Joon-Young
Seo Young-joo
Lee So-Woo
Seo Shin-ae
Park Cho-Rong
Cho Jae-hyun
Han Kyung-Moon
Shin Se-hwi
Lee Joo-Ri
Ahn Seung-gyun
Choi Seung-hyeon
Ahn Nae-sang
Ko Sang-Joong
Kim Yeo-jin
Seo-Yeon's mother
Shin Eun-jung
Teacher Kim
Yoo Ha-bok
Principal
Shim Yi-young
Detective Oh
Ahn Sol-bin
Lee Yoo-Jin
Ji Su-yeon
homeroom teacher
Lee Do-gyeom
Lee Sung-Min
Kim So-hee
Kim Soo Hee
