Prior to CLC's debut, Yeeun, alongside the four other original members, worked as backup dancers for G.NA during her promotions for "G.NA's Secret".
2015: Debut with CLC
Yeeun debuted as a member of CLC on March 19, 2015 with the group's first mini album First Love.
2018–2019: The Show
On May 21, 2018, it was announced that she would be one of the new MCs for The Show, along with Jeno and Yongguk. Her first episode as an MC was aired the next day on May 22.
On November 26, 2019, Yeeun and Jeno stepped down from their position as The Show MCs.
2020: Good Girl
In May 2020, she became a contestant on the survival show Good Girl. In the fourth episode, she participated in the second round where the contestants went against AB6IX and Mommy Son. In the round against AB6IX, she performed "Witch", along with Jeon Jiwoo, Jamie, Cheetah, and Hyoyeon, and won. She went against Mommy Son, where she performed "Barbie", and won.
In the eighth and final episode, aired on July 2, she participated in a versus battle against Jeon Jiwoo where she performed "Mermaid" and lost against Jiwoo.