After the success of the song "I Want to See", Kim wanted to appear on television again. He made his agency allow him once more to be broadcast. He appeared on a show called "Love Letter". He received good comments from the public. His song "I Want to See" was selected to be on the soundtrack of the drama "Stairway to Heaven". Kim has remained best known for this song. His later albums were not very successful. He served his military service from 2006 to 2008. After he was discharged from the army he released his sixth album, "The Practical Usage of Sadness". His seventh album, "Solista", was an ambitious work. The first part was released in 2010, but was not successful.