Hyuk

On April 19, 2019, Gun debuted as a member of ENOi with their first digital single "Bloom". On January 22, 2021, Kithewhale Company announced through the group's fan cafe that ENOi had disbanded after Avin, Jinwoo, and J-Kid decided to terminate their contracts on the 31st, with the remaining four members, including Gun, continuing activities under the agency. On March 26, 2021, Gun, now known as Hyuk, was officially revealed as one of the 11 members that were a part of the upcoming boy group OMEGA X.

The group debuted on June 30, 2021 with the mini album Vamos. On September 23, 2025, he was introduced as a contestant on the Mnet's band survival show STEAL HEART CLUB. On November 18, he was eliminated in episode 5.