A-zi

On March 18, 2011, she debuted as a member of the girl group CHI CHI with their first digital single "Don't Play Around", under the stage name A-zi. The group presumably disbanded in October 2013. On February 7, 2020, she appeared on the television show I Can See Your Voice 7, under the name Baek Seo-yul.

After winning the episode, she was given a chance to release the digital single "If It Is You". However, she did not pursue any further activities in the entertainment industry after this. During her appearance on the show, she also shared that she started working as a realtor.