• 
  Jeong-tae Kim

  Sun-il (as Kim Jung Tae)
• 
  Han Hye Rin

  Hyun-ji (as Hye-Lin Han)
• 
  Ha-Neul Kim

  In-su
• 
  So-eun Kim

  Sae-hee
• 
  Kim Jung Tae

  Sun-il
• 
  Hye-Lin Han

  Hyun-ji
• 
  Doo-Sik Park

  Hae-chul
• 
  Haneul Kang

  In-su

• 
  Ah-Hyeon Lee

  Homeroom Teacher
• 
  Min Ha Ju

  Na-ra
• 
  Da-Yeong Ju

  Sung-hee
• 
  Kwak Jung Wook

  Ki-tae
• 
  Choong-Sun Park

  Sae-hee's Father
• 
  Yoon-Hong Oh

  Ah-young's Mother
• 
  Young-Choon Kim

  Ho-sub

• 
  Bom Lee

  Hye-jeong
• 
  Hy-Jeong

  Seung-hyeon
• 
  Ro-sa Kim

  Warehouse Ghost