

One will die for every incorrect answer.
In a prep-class for year-end exams, a sadistic killer puts the students through mind-games in order to save each other.
Chang

Kong Jeong-hwan
Lee Chi-yeong

Ham Eun-jung
Kim Ji-won

Yang Ji-won
Min Hye-yeong

Lee Chae-won
Yeom Ji-hyang

Kwon Hyun-sang
Cha Jae-wook