In 2005, Lee released his first solo album, No Pain, No Gain.[2][3] The album received disappointing sales. In 2007, he released his second album, Lee Jae Won Vol. 1.5. A part of the single "I'm So Hot" samples a rhythm from Mariah Carey's It's Like That. Again the album received disappointing sales. In 2008, he was accused of rape and arrested. The charges were dropped 3 hours later, but because of the event, he was unable to release his next album.[4] In 2012, Jae Won released his new album in Chinese language titled It's the Time. It's received a positive response from fans in China. During his comeback performance, it was speculated that he planned to bring back the H.O.T. group to make a new album.
^Recording Industry Association of Korea chart positions:
No Pain, No Gain: "2005.4월 - 가요 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on 19 March 2007. Retrieved 7 September 2022.
Jaewon: "2007. 5 월 - 가요음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on 12 June 2008. Retrieved 7 September 2022.
^"2005년 - 가요 총결산 음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on 1 August 2008. Retrieved 7 September 2022.
^"2007. 5 월 - 가요음반 판매량". Recording Industry Association of Korea (in Korean). Archived from the original on 12 June 2008. Retrieved 7 September 2022.