Lee Eun Sang is a South Korean singer, dancer, former member of X1 (엑스원) and current member of YOUNITE (유나이트). He graduated from Seoul Performing Arts High School. He was a trainee for one year and five months prior to his appearance in the survival show "Produce X 101". He finished outside of the Top-10 but was chosen by the public as the "X rank" member and secured a spot in the show's project group. He made his debut in August 2019 as X1's lead dancer and vocalist with their first mini-album, "Emergency: Quantum Leap" under Swing Entertainment (스윙 엔터테인먼트). Initially, the group had a 5-year contract. However, the vote manipulation scandal at MNet led to an investigation. They were forced to halt their activities, and after an unsuccessful negotiation about their future with Swing Entertainment and the members' individual agencies, they disbanded in January 2020. He made his debut as a soloist in August 2020 with the single "Beautiful Scar". After switching agencies, he signed with Brand New Music (브랜뉴 뮤직) and re-debuted in April 2022 as YOUNITE's co-leader, lead vocalist, center and face of the group with their first EP, “Youni-Birth“. Watch drama online for free.