Hangyul

The group officially debuted on August 27, 2019 with the mini album, 비상 : Quantum Leap. However, on January 6, 2020, the agencies representing the members announced the group has disbanded due to not being able to reach a unanimous agreement following the Produce 101 vote manipulation controversy. On January 8, it was announced that the official Twitter Account MBK BOYS was changed with POCKETDOLZ that would include in the lineup he and Nam Do Hyun, explaining the official disbandment of MBK BOYS.

He, along with fellow labelmate and X1 member Dohyon, debuted as the duo H&D on April 21, 2020. They disbanded following the release of the special album Umbrella on September 23, 2020. On September 23, he was introduced as one of the members of the pre-debut boy group POCKETDOLZ.

On September 25, it was revealed that the group's name will be BAE173. The group officially debuted on November 19, 2020 with their first mini album Intersection : Spark. On April 17, 2022, it was announced that BAE173's leadership position, which was originally held by Junseo, had been passed onto Hangyul.

On September 29, 2024, Hangyul was introduced as a contestant on the Chinese-South Korean survival show Starlight Boys. During the show's finale, he was revealed to have ranked 6th overall, thus making him a member of POLARIX. On May 28, 2025, Hangyul made his debut as a member of POLARIX with the EP Freefall.

On February 11, 2026, PocketDol Studio announced that Hangyul would be leaving the agency after almost 10 years on February 28 after deciding not to renew his contract. The following day, it was announced he would also conclude his activities with BAE173 on February 28.