Top Billed Cast

• 

  Kim Yoo-nah

  Yun-suk
• 

  Park Nam

  Yun-sik
• 

  Park So-yeong

  Sun-na
• 

  Kim In-jeong

  Ok-i
• 

  박순천

  Mother
• 

  Yoon Cheol-hyeong

  Father
• 

  Ryu Mi-oh

  Vice Principal
• 

  김형일

  Publisher
• 

  백일섭

  Gyeong-su's Father
• 

  김정란

  Gyeong-su's Mother
• 

  여운계

  Doctor
• 

  Jeong Hye-seon

  Principal
• 

  전원주

  School Parent
• 

  Hong Yun-jeong

  Loan Shark
• 

  김일우

  Dispatcher
• 

  Hwang Min

  Korean Teacher
• 

  Seo Chang-sook

  Class Teacher
• 

  이대로

  Grandfather
• 

  한영수

  Yun-sik's Class Teacher
• 

  Lim Sun-taeg

  MC
• 

  Kim Hye-yeong

  MC