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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.
Ko Seo-Yeon
Han Ji-Hoon
Bae Joon-Young
Lee So-Woo
Park Cho-Rong
Han Kyung-Moon
Lee Joo-Ri
Choi Seung-hyeon
Ko Sang-Joong
Seo-Yeon's mother
Teacher Kim
Principal
Detective Oh
Lee Yoo-Jin
homeroom teacher
Lee Sung-Min
Kim Soo Hee