• 
  Kim Yeo-jin

  dna. Go
• 
  Nae-sang Ahn

  (unknown episodes)
• 
  Jae-hyeon Jo

   Han Gyeong-moon (12 episodes, 2016-2017)
• 
  Yi-yeong Shim

   Detective Oh (12 episodes, 2016-2017)
• 
  Hyeon-soo Kim

   Go Seo-yeon (12 episodes, 2016-2017)
• 
  Young-ju Seo

   Lee So-woo (12 episodes, 2016-2017)
• 
  Eung-Jung Shin

   Teacher Kim (12 episodes, 2016-2017)
• 
  Seo Ji-Hoon

   Bae Joon-young (12 episodes, 2016-2017)

• 
  Dong-Yoon Jang

   Han Ji-hoon (12 episodes, 2016-2017)
• 
  Eun-Jeong Sin

   Teacher Kim (12 episodes, 2016-2017)
• 
  Kyu-Young Park

   Baek Hye-Rin (12 episodes, 2016-2017)
• 
  Jin-ah Kim

   Detective Oh (12 episodes, 2016-2017)
• 
  Shin-ae Seo

  12 episodes, 2016-2017
• 
  Sol-bin Ahn

  8 episodes, 2017
• 
  Se-Hwi Shin

  8 episodes, 2017

• 
  Sol-bin Ahn

  Yoo-Jin Lee