Mutt Boy is 2003 South Korean film is about a retarded man nicknamed as stray dog by people because his strange behaviour. It stars Jung Woo-sung

Jung Woo-sung

- Career :Jung Woo-sung was born in Seoul on March 20, 1973. After first finding work as a model, he made his film debut in the 1994 movie The Fox with Nine Tails, together with Ko So-young...

 and Uhm Ji-won in lead roles (they later starred in Korean blockbuster The Good,The Bad and the Weird (2008))

Plot

Cha Cheol-min was raised by his police officer father, as his mother died gave birth to him. He is nicknamed Stray Dog by a neighbour because of his behaviour after his only friend, a dog was killed by his classmate years ago. Cheol-min's father struggles to protect his son from bullies. one day his father takes in a young orphan named Jeong-ae who was a thief. Eventually Cheol-min and Jeong-ae develop feelings each other and Chul-min confronts MJK Gnag who killed his beloved dog

Cast

• Jung Woo-sung
  Jung Woo-sung
  - Career :Jung Woo-sung was born in Seoul on March 20, 1973. After first finding work as a model, he made his film debut in the 1994 movie The Fox with Nine Tails, together with Ko So-young...
  
   ... Cha Chul-min
• Uhm Ji-won ... Jung-ae
• Kim Kap-su
  Kim Kap-su
  Kim Kap-soo is a South Korean actor. His acting debut was in 1977. Kim is a high profile actor in his age bracket and has had a long career as an actor on the stage, in television dramas and film. He is well respected in Korea for his acting ability and is a sought after lecturer...
  
  ... Chul-min's father
• Kim Jung-tae ... Jin-mook
• Hong Ji-Yeong
• Kim Sang-Ho
• Lee Hwan
• Heo-wook