Yoo Seung-ho
Han Jung-hoon
4th period murder mystery. During fourth period, high schooler Da-Jeong finds her classmate Tae-Gyu dead in a classroom and Jeong-Hun standing in front of him with blood on his clothes. In order to stop Jeong-Hun from becoming the prime suspect, Da-Jeong must help him find the real murderer, who is still inside the school building, under 40 minutes before period four ends.
4gyoshi churi yeongyeok
Han Jung-hoon
Lee Da-jeong
Kim Tae-gyoo
Byeong-soo
Kang Gook-man
Crazy
Yun Sang-mi
Do-il
Hong Ju-hee
Tak Teuin
Headmaster
Fan
History teacher
Student in Grade 2 Class 5
Student in Grade 2 Class 5
Student in Grade 2 Class 5
Virtual Criminal
Director / Adaptation
Writer
Executive Producer
