Death Bell

In a prep-class for year-end exams, a sadistic killer puts the students through mind-games in order to save each other.

• 
  Lee Beom-soo

  Hwang Chang-wook
• 
  Yoon Jung-hee

  Choi So-yeong
• 
  Nam Gyu-ri

  Kang Yi-na
• 
  Kim Bum

  Kang Hyeon
• 
  Son Yeo-eun

  Yoon Myung-hyo
• 
  Lee Eol

  Security guard
• 
  Kong Jeong-hwan

  Lee Chi-yeong
• 
  Ham Eun-jung

  Kim Ji-won
• 
  Yang Ji-won

  Min Hye-yeong
• 
  Lee Chae-won

  Yeom Ji-hyang