[3] Choi joined A Cube Entertainment (which became Plan A in 2015 and then IST Entertainment in 2022) as a trainee in 2014 and was among the company's earliest batch of male trainees alongside Victon members Heo Chan, Han Seung-woo and Kang Seung-sik.

Choi withdrew from the show permanently on July 11 to recover from the increasing pain brought by his chronic Achilles tendinitis.

[7] After recovering, he became an MC for the SBS MTV program Banban Show along with host Jang Sung-kyu and fellow Produce X 101 participant Song Yuvin.

During promotions for Victon's sixth EP Continuous Choi limited his participation due to a herniated disk in his neck.

[3] He played the role of Kim Yoo-shin and he gained praise for his three-dimensional acting for the character.