OH MY GIRL is a seven-member South Korean girl group under WM Entertainment. The group consists of seven members, Seunghee (승희), Hyojung (효정), Mimi (미미), YooA (유아), Binnie (비니), Arin (아린) and Jiho (지호). Prior to their debut, they were promoted as B1A4's sister group. OH MY GIRL released their first mini-album ''OH MY GIRL'' on April 20, 2015. Later in the summer of that year, WM Entertainment announced a fall comeback.