[8] On March 20, 2018, Yeeun made her runway debut for Greedilous at the 2018 F/W Hera Seoul Fashion Week, which was held at Dongdaemun Design Plaza.

[9][10] On May 21, SBS MTV announced that Yeeun had been selected to be host The Show starting from the 149th episode, on May 22, 2018, alongside NCT Dream's Jeno and Jin Longguo.

In June 2021, Cube Entertainment announced that Yeeun would make her acting debut with her fellow members, Oh Seung-hee and Jang Seung-yeon, in the short film anthology series, Tastes of Horror.

[25] In March 2023, SuperBell Company announced that Yeeun would be making her solo debut on April 13, with the single album "The Beginning" and its title track "Cherry Coke".

[27] On May 18, SuperBell Company confirmed Yeeun's participation in Mnet's reality competition show Queendom Puzzle after her appearance in the Pick-Cat team's special performance video which was released on the same day.

[28] On August 16, Yeeun placed 7th with a total of 350,517 points in the final episode of Queendom Puzzle, allowing her to debut with the winning group El7z Up.

[30] Yeeun is well known for having sported a bob cut during CLC promotions spanning 2018 to 2019, gaining the moniker of "단발머리 걔" (short-haired girl) in the Korean media.