• 
  Yoo Gong

   Kim Shin (2016)
• 
  Dong-Wook Lee

   Wang Yeo (2016)
• 
  In-Na Yoo

   Kim Sun (Sunny) (2016)
• 
  Kim Go-Eun

   Ji Eun-Tak (2016)
• 
  Lee El

   (2016)
• 
  Sung-Jae Yook

   Yoo Duk-Hwa (2016)
• 
  So-hyun Kim

   Kim Sun (8 episodes, 2016-2017)
• 
  Min-jae Kim

   Wang Yeo (8 episodes, 2016-2017)

• 
  Jo Sin-je

  9 episodes, 2017
• 
  Byeong-cheol Kim

  13 episodes, 2016-2017
• 
  Sung Kyum Kim

  12 episodes, 2016-2017
• 
  Woong Choi

  8 episodes, 2016-2017
• 
  Hye-ran Yeom

  9 episodes, 2016-2017
• 
  El Lee

  Samshin
• 
  In-Na Yoo

  Sunny

• 
  Young-ki Jung

  Kyung Shik (Eun Tak's cousin)
• 
  Kyung-hye Park

  Virgin Ghost
• 
  Choi Ri

  Kyung Mi (Eun Tak's cousin)
• 
  Ko Bo-Gyeol

  Class President
• 
  Anastasia Kim

  Kim Sun's Court Lady