Hyeyoung

On March 12, 2021, Hyeyeong was revealed as a member of Future Idol Asia's girl group Sparkling as part of their seventh installment of the 'Future Idol Debut Project' which aims to debut various idol groups throughout 2021 and 2022. A few months later, on August 25, 2021, Hyeyoung was revealed as a member of the girl group, Ferry Blue. Ferry Blue is a girl group formed by the Dance Department of Paekche Institute of the Arts.

Sparkling's and Ferry Blue's debut date were only 3 days apart and thus Hyeyoung made her debut with Ferry Blue first on September 6 with the single "Call My Name", and then Sparkling on September 9, 2021 with the single "Cheerful".