On February 3, 2016, it was revealed that three original members (Eunyoung, Seoah, and Yejin) had left the group with an addition of five new members: Minyoung, Yoojung, Eunji, Yuna, and Hayoon. The group would continue as a seven-member girl group and was revealed to have been in the final stage of preparations for their comeback. On February 10, it was announced that the their comeback would be on February 16. On February 16, they released their third digital single "Deepened" along with its music video.