• 
  Ah-sung Ko

   Eun Ho-won (2017) (unknown episodes)
• 
  Seok-jin Ha

   Seo Woo-jin (16 episodes, 2017)
• 
  Hoya

   Jang Kang-ho (16 episodes, 2017)
• 
  Dong-Hwi Lee

   Do Ki-taek (16 episodes, 2017)
• 
  Hyeon-woo Kim

  Kang Tae-Yang
• 
  Dong-wook Kim

  Seo-hyun (2017)
• 
  Shin-yeong Jang

  Jo Seok-kyung (2017)
• 
  Hae-hyo Kwon

  Park Sang-man (2017)

• 
  Sun Hwa Han

  Ha Ji-na
• 
  Dae-hwan Oh

  Lee Yong-jae (2017)
• 
  Hee-Chan Kim

  Oh Jae-min (2017)
• 
  Yu-Mi Kim

  Lee Hyo-ri (2017)
• 
  Bum-ho Choi

  Seo Tae-woo (2017)
• 
  Ye-jin Lim

  Mrs. Eun (2017)
• 
  Se-wan Park

  Lee Kkot-bi (2017)