Officer Black Belt

A talented martial artist who can't walk past a person in need unites with a probation officer to fight and prevent crime as a martial arts officer.

• 
  Jason Kim

• 
  Kim Woo-bin
  Lee Jung-do
• 
  Kim Sung-kyun
  Kim Sun-min
• 
  Lee Hyun-gul
  Kang Ki-jung
• 
  Park Ji-yeol
  Cho Min-jo
• 
  Lee Jung-ok
  Han Byung-soon
• 
  Kim Yo-han
  Moisture
• 
  Kang Hyung-suk
  Writer K
• 
  Cha Wang-hyeon
  Earthworm
• 
  Lee Hae-yeong
  Lee Sang-woo
• 
  Kim Ji-young
  Ha Sun-jung
• 
  Kang Seung-ho
  Kim Min-wook
• 
  Son Sang-yeon
  Lee Yang-ho
• 
  Park Jong-hee
  Kim Gum-nam
• 
  Choi Funny
  An Joong-ho
• 
  Kim Yool-ho
  Police Sergeant Choi
• 
  Ji Jin-hee
  President
• 
  Lee Jung-hyun
  Self-defense Shop Clerk
• 
  Kwon Il-yong
  Profiler
• 
  Ahn Chae-heum
  Lee Min Ju
• 
  Kim Kyu-na
  2F girl