• 
  J.B.

  12 episodes, 2015
• 
  Jackson Wang

  12 episodes, 2015
• 
  Ha-yoon Song

   Joo In Hyeong
• 
  Min

   Lee Jenny
• 
  BamBam

   BamBam
• 
  Yu Gyeom Kim

   Yu Gyeom
• 
  J.B.

   J.B.
• 
  Jackson

   Jackson

• 
  Mark

   Mark
• 
  Youngjae

   Youngjae
• 
  Junior

   Junior
• 
  J.Y. Park

   the Moon
• 
  Jin-young Park

   the Moon (as J.Y. Park)
• 
  Jinyoung

  12 episodes, 2015
• 
  Woo-jin Jung

  5 episodes, 2015

• 
  Hee-won Kim

  6 episodes, 2015
• 
  Yoo-jin Park

  6 episodes, 2015
• 
  Yu-Kyeong Kang

  5 episodes, 2015
• 
  Ji-Hyun Ahn

  5 episodes, 2015
• 
  Hyun-ji Park

  6 episodes, 2015
• 
  Mark Tuan

  12 episodes, 2015
• 
  Young Jae Choi

  12 episodes, 2015
• 
  Yoon-sun Jung

  In-hyeong's Mom
• 
  Chang-Hwan Ahn

  Doctor
• 
  Hee-Ryung Jang

  Ji-soo