Song Won-geun is a South Korean singer and actor. Song made his entertainment debut in 2000 as a member of the hip-hop boyband OPPA, singing in the group's second album Reincarnation. He then launched his career as a solo artist under the stage name RUN, releasing one album and two singles in 2008 to 2009. Song also began acting in 2010, and has since starred in several stage musicals and television dramas. (Source: Wikipedia) Watch drama online for free.