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one of the first groups to debut with a unique admissions and graduation concept in Korea, where members are added or withdrawn in a natural manner, a format frequently used in Japan.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RSM has an admission-graduation system, where members are added or withdrawn in a “natural” manner.
Birth name	Birth name	Birth name	Date of birth	Joined
Romanized 	Hangul 	Kanji 	Date of birth	Joined
Choi 	최 	チェ 	8/28/1988 	Debut
Jung 	정 	ユング 	4/21/1990 	Debut
Kerri 	케리 	ケリー 	8/20/1995 	August 2013
Rainelle 	라이넬 	雨 	9/3/1991 	December 2008
Jihye 	지혜 	智 	5/1/1989 	March 2009
Shiroko 	시로코 	白子 	2/27/1994 	January 2012
Rayeon 	라용 	ラヨーン 	4/17/1991 	January 2015
Shihyang 	시춘향 	市郷 	11/1/1992 	January 2015
===Graduate members===
Former Members	Former Members	Former Members	Joined 	Graduated
Romanized 	Hangul 	Kanji 	Joined 	Graduated
Emi 	에미 	エミ 	May 2008 	October 2008
Min-Yung 	민 영 	ミン·ヨン 	June 2007 	April 2009
Tonya 	토냐 	トーニャ 	Debut 	February 2011
Dina 	디나 	ディナ 	August 2010	February 2011
Bethany 	베다니 	ベサニー 	April 2009 	August 2013
Nanase 	나나세 	七瀬 	May 2011 	August 2013
Mayu 	마유 	まゆ 	March 2011 	June 2014
===Timeline===
ImageSize = width:1000 height:200
PlotArea = width:405 height:175 left:75 bottom:20
Alignbars = justify
DateFormat = mm/dd/yyyy
Period = from:2006 till:2015
TimeAxis = orientation:horizontal format:yyyy
Colors = 
 id:1g value:rgb(0,0,0.9) legend:1st Generation
 id:2g value:rgb(1,0,0) legend:2nd Generation
 id:3g value:rgb(1,0.5,0) legend:3rd Generation
 id:4g value:rgb(1,0.9,0) legend:4th Generation
 id:5g value:rgb(0.12,0.84,0.36) legend:5th Generation
 id:6g value:rgb(1,0,1) legend:6th Generation
 id:7g value:rgb(1,0.5,0) legend:7th Generation
 id:8g value:rgb(1,0.15,1) legend:8th Generation
 id:9g value:rgb(1,0.17,1) legend:9th Generation
Legend = orientation:vertical position:right
ScaleMajor = unit:year increment:1 start:2006 gridcolor:black
PlotData =
 color:blue width:10 textcolor:black align:left anchor:from
 bar:Choi from:start till:end Color:1g
 bar:Jung from:start till:end Color:1g
 bar:Tonya from:start till:02/21/2011 Color:1g
 bar:MinYung from:06/26/2007 till:04/05/2009 Color:2g
 bar:Emi from:05/19/2008 till:10/04/2008 Color:3g
 bar:Rainelle from:12/15/2008 till:end Color:3g
 bar:Jihye from:03/28/2009 till:end Color:4g
 bar:Bethany from:04/14/2009 till:08/01/2013 Color:4g
 bar:Dina from: 08/30/2010 till:02/03/2011 Color:5g
 bar:Mayu from: 04/11/2011 till:06/22/2014 Color:6g
 bar:Nanase from: 05/23/2011 till:08/01/2013 Color:6g
 bar:Shiroko from: 01/10/2012 till:end Color:7g
 bar:Kerri from: 09/06/2013 till:end Color:8g
 bar:Rayeon from: 01/01/2015 till:end Color:9g
 bar:Shihyang from: 01/01/2015 till:end Color:9g