H.O.T disbanded in 2001, and in the same year, Jang Woo-hyuk formed a new group, JTL, with two of its former members, Tony and Lee Jae-won, and released two albums. However, the three members finally chose to go solo in 2004 in order to have a better development.
After that, Jang Woo-hyuk released his debut album "The Sun That Never Sets" in 2005. Jang Woo-hyuk is known as the "King of Dance" in Korea, and because of his good looks, talent and unrivaled charisma among fans, the album was a huge success, and Jang Woo-hyuk held his first solo concert in Seoul, Korea, at the end of 2005.