On the afternoon of March 31, an on-line showcase commemorating the release of WJSN (EXY, Seol-a, Bona, Suvin, LUDA, Dawon, Eunseo, Summer, Dayoung, Yoo Yeon-jung)'s new mini album "UNNATURAL" was held at Yes24 Live Hall in Gwangjin-gu.
About WJSN
WJSN, also known as Cosmic Girls, is a South Korean-Chinese girl group formed by Starship Entertainment and Yuehua Entertainment. The group debuted on February 25, 2016, with the extended play Would You Like? and with twelve members: Seola, Xuanyi, Bona, Exy, Soobin, Luda, Dawon, Eunseo, Cheng Xiao, Meiqi, Yeoreum and Dayoung. In July 2016, WJSN added a thirteenth member, Yeonjung, to the group.
 Wikipedia