[2][3] Choa's first step in becoming an idol was when she met singer-songwriter Juniel, who told her about FNC's auditions for their girl group, AOA.

Her agency, FNC Entertainment, revealed photos of Choa practising the duet song, "Start of Something New".

The musical ran from July 2 to September 1 at Seoul's Blue Square Samsung Card Hall.

On March 25, 2015, it was revealed that Choa would be one of the members on the studio panel for MBC's We Got Married, replacing Hong Jin-young.

[20] In October 2016, Choa was confirmed to be the MC of JTBC new variety show Sing For You, scheduled for December 3, 2016.

[22] This followed after Choa had a hiatus from the group following their activities from January 2017 when they released their first studio album Angel's Knock.

[25] Officials confirmed her participation after viewers heard the song on the August 3 broadcast of the show, and speculated that the singer sounded similar to Choa.

[29] On November 28, 2023, Choa was announced as one of the cast members of "Diva Sisters", which is a variety show featuring five singers who get together to talk candidly about the entertainment industry and their careers.