Hajin

In early March 2019, she was introduced as a new member of the girl group The Singing Girls. Her first release with the group was the digital single "Dream of Star" on March 27, 2019. The group also revealed that they would be re-debuting under the name Melody Pink.

Melody Pink released the digital single "Hey U" on September 25, 2019. She left the group in late 2019.