Hwayi: A Monster Boy
화이: 괴물을 삼킨 아이 (original)
After being kidnapped as a small child and raised by the five men who abducted him, a teenage boy is now forced to join their life in crime.
Starring Kim Yoon-seok, Yeo Jin-goo, Cho Jin-woong, Jang Hyun-sung, Kim Sung-kyun, Park Hae-jun, Im Ji-eun, Park Yong-woo, Kim Young-min, Seo Young-hwa
Watch "Hwayi: A Monster Boy" on Roku Channel released in 2013. It's a action & adventure and thriller movie, and has a rating of 7 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.