RSM

RSM (Romantic Sexy Mistresses; Japanese: ロマンチックセクシーな愛; Korean: 낭만주의 섹시한 사랑) is a Japanese-South Korean girl group formed by Tu Rage Records in 2006. They were known as one of the first groups to debut with a unique admissions and graduation concept in Korea, where members are added or withdrawn in a natural manner, a format frequently used in Japan. Currently, there are eight members in the group: Rayeon, Shihyang, Kerri, Rainelle, Jung, Choi, Shiroko, and Jihye.

Members
RSM has an admission-graduation system, where members are added or withdrawn in a “natural” manner.