She was last active as a member of South Korean girl group Uni.T, until their disbandment in September 2018.

The video ended up in the hands of Chae Jong-ju, the CEO of JJHolic Media who later called her in for an audition.

On November 15, she released her second single "Oh My God", this time she appeared in the music video.

Along with Sungwon from A-Prince, NC.A will be an MC of the new music show Ranking Reformat which will air from Monday to Friday at 12AM KST.

She held her debut stage of "Coming Soon" on KBS's Music Bank January 2.

Through NC.A's official Facebook and Twitter it was announced on March 25 that the following day she would release her new single Cinderella Time and they posted the concept images.

[16] On July 20 NC.A released her new song Vanilla Shake and Jeong Jae Yong and NS Yoon-G were featured in the MV.

[19] In October 2017, NC.A participated on South Korean survival reality show, The Unit.

The concept of the show is to form male and female unit groups of nine members each, among idols who had already debuted.