Choi Yong Joon is a South Korean singer, lyricist, composer, and actor. He graduated with a bachelor’s degree in Film from Seoul Arts College. He made his debut as a solo singer with the song "Maybe That" in 1989, and in 1993, he also worked as a vocalist for the project rock music band "K". Two years later, in 1995, he debuted as an actor in the KBS drama "Applause".
(Source: Korean = Wikipedia || Translation = MyDramaList)