JYP announced in June 2015 that the group would comeback as a four-member band after a two-year hiatus. Sunmi, who had left the group in 2010 to pursue academics and a solo career, returned. On July 20, 2015, JYP officially announced the departures of Sunye and Sohee.
The group announced their disbandment on January 26, 2017. They released their final single "Draw Me" on February 10, 2017.