Lee Chang Sun is a multi-talented South Korean artist, boasting a diverse repertoire as a singer, dancer, model, and former member of 24K and TAN. His educational background includes graduating from Yangmyung High School and later acquiring an associate's degree in Practical Dance from Kookje University.
Lee Chang Sun initially made his debut in August 2016 as the new main dancer and vocalist of 24K, joining the group with their digital single "Still 24K". Unfortunately, the group faced numerous challenges, including an unstable fanbase, extended hiatuses, and constant lineup changes starting from 2014.
In January 2019, Lee Chang Sun took on the role of leader after Corbyn's departure from the group. He remained with 24K until June 2021, when he participated in the digital single "Mainstreet", marking his final collaboration with the group.
Subsequently, Lee Chang Sun joined the singing survival show "Extreme Debut: Wild Idol" and emerged victorious, securing a spot in the new project group TAN. He signed a two-and-a-half-year contract with Think Entertainment and re-debuted in March 2022 as the leader, main dancer, and sub-vocalist of TAN, with the release of their 1st mini-album "1TAN".
In September 2023, Lee Chang Sun officially announced his departure from 24K to focus exclusively on TAN. However, Think Entertainment was subsequently embroiled in several controversies, and all members, including Lee Chang Sun, terminated their contracts in June 2024.
A few weeks later, Lee Chang Sun announced the disbandment of TAN and decided to step away from his idol career. He then enlisted for his mandatory military service on October 7, 2024, and was discharged on April 6, 2026.
