Yook Jin Soo is a South Korean MMA fighter and actor. He began practicing Brazilian jiu-jitsu and became one of the first athletes to promote the sport in South Korea in the early 2000s. He opened a gym in Incheon and began collaborating with a boxing academy in Brazil to start an exchange of instructors. His career as a martial artist ended in 2016 and switched his focus to the entertainment industry. (Source: MyDramaList) Watch drama online for free.