After School was a South Korean girl group formed by Pledis Entertainment in 2009. They were the first group to debut with a unique admissions and graduation concept in Korea, where members were added or withdrawn in a “natural” manner. All former members: Raina, Nana and E-Young. Soyoung withdrew from the group in fall 2009, Bekah officially graduated from the group in July 2011, former leader Kahi graduated in September 2012, Jooyeon graduated in January 2015 and Jungah graduated in January 2016.