YMC Entertainment have revealed the D-7 teaser image for I.O.I’s first sub-unit on August 2. Seven I.O.I members, Jeon So Mi, Choi Yoo Jung, Kim Chung Ha, Kim So Hye, Pinky, Kim Do Yeon and Im Na Young, make up the sub-unit.

The sub-unit will make their debut on August 9.