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A male student's body is found at school. Authorities assume that the student killed himself in a fall. Other students at the school hold a trial to uncover the truth behind his death.
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 E-su
homeroom teacher
Lee Do-gyeom
Lee Sung-Min
