Start-Up

Two boys are becoming real adults during a turbulent time as they experience a world that doesn't go their way.

• 
  Ma Dong-seok

  Geo-seok
• 
  Park Jeong-min

  Taek-il
• 
  Jung Hae-in

  Sang-pil
• 
  Yum Jung-ah

  Jeong-hye
• 
  Choi Sung-eun

  Gyeong-ju
• 
  Kim Jong-soo

  Mr. Gong
• 
  Yoon Kyung-ho

  Kim Dong-hwa
• 
  Kim Min-jae

  Kwak Seong-mu
• 
  Goh Doo-shim

  Sang-pil's Grandmother
• 
  Park Hae-joon

  Tae-seong