Hayoung

She debuted as a member of Apink on April 19, 2011 with the group's first mini album Seven Springs of Apink. On August 21, 2019, she debuted as a solo artist under her full name Oh Hayoung with her first mini album Oh!. On April 28, IST Entertainment announced that Chorong, Bomi, Namjoo, and Hayoung decided not to renew their contracts but will still maintain their activities as members of Apink.

On that same day, it was announced that she, alongside Chorong, Bomi and Namjoo, had signed exclusive contracts with Choi Creative Lab. The agency detailed plans of supporting their individual activities and as well as the future of Apink. On June 10, 2025, With US Entertainment announced they will take full responsibility for the managing of Apink Chorong, Bomi, Namjoo, and Hayoung.