4th Period 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.

• Lee Sang-yongDirector
• Shin Jai-hoWriter

• Yoo Seung-hoHan Jung-hoon
• Kang So-raLee Da-jeong
• Sang-geun JoKim Tae-gyoo
• Jeong Seok-yongKang Gook-man
• Jeon Jun-hongEmbassy
• Rie Young-zinYun Sang-mi
• Kim Dong-beomDo-il
• Jo Yun-heiHong Ju-hee
• Lee Chan-hoCast
• Im Soo-hyangCast
• Jung Young-kiCast
• Park Cheol-minCrazy