Hwanhee

On September 6, 2015, Hwanhee's teaser photos for UP10TION's then upcoming debut was released. On September 10, he then debuted as a member of UP10TION with their debut mini album Top Secret. He appeared as a contestant on Mnet's reality survival show Boys Planet.

However, on March 9, 2023, TOP Media announced that he dropped out of the show due to health issues. On March 20, 2023, it was announced that Hwanhee would be leaving TOP Media after his participation in Boys Planet. On June 27, a source from PA Entertainment announced that Hwanhee has signed with them and would continue to promote in diverse fields in both Korea and overseas under his real name.