• 
  In Guk Seo

   Lee Hyun (unknown episodes)
• 
  Na-ra Jang

   Cha Ji-an (16 episodes, 2015)
• 
  Jae-young Kim

   Min Seung-joo (16 episodes, 2015)
• 
  Ji-Eun Lim

   Hyun Ji-soo (12 episodes, 2015)
• 
  Duek-mun Choi

   Na Bong-sung (14 episodes, 2015)
• 
  Cheon-hee Lee

   Kang Eun-hyuk (16 episodes, 2015)
• 
  Won-young Choi

   Lee Joon-ho (15 episodes, 2015)
• 
  Nam Kyung-eub

   Kang Seok-joo (10 episodes, 2015)

• 
  Park Bo-Gum

   Jung Sun-ho (14 episodes, 2015)
• 
  Sung-Wook Min

   Son Myeong-Woo (16 episodes, 2015)
• 
  Eun-Taek Hong

   Jung Sun-Ho (young) (10 episodes, 2015)
• 
  Seung-Won Son

   Choi Eun-Bok (16 episodes, 2015)
• 
  Hyun-Taek Hong

   Lee Hyun (young) (11 episodes, 2015)
• 
  Sung-wuk Min

   Son Myeong-Woo (16 episodes, 2015)
• 
  Dong-mi Shin

  Yang Eun-jung

• 
  El Lee

  Kang Sung-eun
• 
  Kyung-soo Do

  Lee Joon-young
• 
  Kwang-ryul Jun

  Lee Joong-min