[2] On July 21, it was revealed that the full line-up for the sub-group consists of members Gyeongree (Center), Hyemi (Leader), Sojin (Rapper) and Keumjo (Main Vocal), also revealing that the song "Lip 2 Lip" will be their debut song.[3] Nine Muses A is a shortened name for Nine Muses Amuse, meaning that the group will always make others happy and let them have a great time with their performance.[4][5]