Joo

On August 13, 2022, Joo was seen performing as a member of N-DAY. N-DAY further confirmed Joo's addition to the group as they subsequently started following her on their Instagram account. It was later revealed that she had changed her stage name to Jia as she changed her Instagram username.

The group debuted on January 24, 2024 with the digital single "That's Me". She had reverted her stage name back to Joo.