As of June 2012, Kahi graduated from After School and continued her career as a solo singer and actress with Pledis before her contract ended in January 2015.

She found her passion for dancing when she was 16 and also around this time became fascinated by the hip hop group Roo'ra, which would motivate her to become a singer.

At first, she obeyed his wishes, however, she was unable to endure being a college student and eventually left her hometown to pursue a dancing career.

[citation needed] In 2000, Kahi was chosen as the main dancer for DJ Doc's mega-hit, "Run to You".

However, this instant success also brought her huge stress and eventually forced her to leave for a period of time.

She was also the dance teacher for Son Dam Bi, May Doni, and Kim Jung Ah, her future bandmate.

Rumours of her leaving the group had begun as early as 2010 when Pledis Entertainment initially announced she would release a solo album.

[6] The album photos were noted for highlighting the singer's "S-line",[7] while netizens and news articles commented on the contrasting "black vs. white" images and "charisma" in the teaser.

[9] The music video for "Come Back, You Bad Person" was released on February 14, 2011, and Kahi began promotional activities on 18th.

[10] In early 2012, Kahi was cast in Dream High 2, playing a teacher at Kirin Art School.

On March 26, 2016, Kahi married entrepreneur Yang Jun-mu (CEO of Incase Korea) in a private ceremony in Hawaii.