[2] Kim joined with After School's unofficial first appearance on December 29, 2008, at the SBS Song Festival, performing "Play Girlz" with Son Dam-bi and Kahi.

[8][9][10] On January 28, 2016, Jung Ah's contract with Pledis Entertainment expired and she graduated from After School after seven years of activity.

[11][12] On May 25, 2016, Jung Ah announced she'd debut as a solo artist with a new album in June,[13][14] featuring rapper J-STAR.

On March 25, 2013, reports surfaced stating that Jungah and Shinee's Onew had been dating for over a year after images were released showing them together.

[19] In mid 2015, reports arose stating that Jungah and basketball player Jung Chang Young were dating.