Yoon Kye-sang is a South Korean actor and singer. He began his career in 1999 as part of the K-pop boy band g.o.d, then left the group in 2004 and pursued an acting career. He made his acting debut in the film Flying Boys (2004), for which he won Best New Actor at the Baeksang Arts Awards. Yoon became active in both television and film, with leading roles in romantic comedies such as My 19 Year Old Sister-in-Law (2004) and Who Are You? (2008) and the melodrama Crazy for You (2007), as well as more serious fare in The Moonlight of Seoul (2008) and The Executioner (2009). After a supporting turn in the hit series The Greatest Love (2011), he returned to the big screen in the well-received indie Poongsan (2011).

Groove Over Dose, known by the acronym g.o.d, is a South Korean boy band formed by SidusHQ. Debuting in 1999, the group became one of the most popular boy bands of the early 2000s in South Korea. The members had gone on to solo careers in the entertainment industry after indefinitely discontinuing group activity in 2005 following the departure of a member. However, they regrouped as a quintet and made a comeback in July 2014. Although the group is largely known for their "story telling" lyrical style and signature blend of R&B and rap, their repertoire features a diverse array of genres ranging from hip hop to funk.