Mnet M Countdown camera rehearsal was held at CJ E & M Center in Sangam-dong, Seoul on the afternoon of the 13th.
OH MY GIRL Arin has photo time.
About OH MY GIRL
Oh My Girl is a South Korean girl group formed by WM Entertainment. The group is composed of six members: Hyojung, Mimi, YooA, Seunghee, Yubin and Arin.
 Wikipedia