Lee Eun Sung

On January 12, 2025, he was shown as a contestant in the first episode of the ENA survival show Undercover. On January 26, it was revealed that he passed the first round after performing "Joah" by Jay Park. During the second round, he performed "D (Half Moon)" by DEAN & Gaeko in the third episode with Blue.

D, uyoonji, and Hwang In Ho. On February 9, he was eliminated in the fifth episode after he did not receive a pass to the third round.