Known best as the bassist of a South Korean music group called CNBLUE, this instrumentalist and sometimes rapper also had a career as a fashion model, appearing in runway shows and advertising campaigns for such prominent designers as Song Ji Oh and Song Hye Myung.
He became a member of CNBLUE in late 2009, upon the departure of the band's previous bassist, Kwon Kwang Jin.
An actor as well as a musician, he appeared in 2012 and 2013 episodes of the KBS2 shows My Daughter Seo-young and The Blade and Petal.
Born and raised in the Seoul satellite city of Ilsan, South Korea, he grew up with one older brother.
He and guitarist Lee Jong-hyun were both members of CNBLUE.