[1][2][3] Kim debuted in 1999 with his first album, I Am 18 Years Old, on which he single-handedly took care of the composition, lyrics, arrangement, and instrumentals.
After his second album in 2001, Kim retreated from the public eye, though he continued to work in music production and perform occasional live gigs.
Kim returned in 2007 with the release of his third album, U Turn.
It features ten new songs, mostly leaning towards band sound with a relaxing mood, simple guitar arrangements, and emotionally honest lyrics.
[4][full citation needed][5] On September 1, 2009, Kim released his EP Behind the Melody, containing five songs.