Apink is a South Korean girl group formed by IST Entertainment. The group debuted on April 19, 2011, with the extended play (EP) Seven Springs of Apink. Apink currently consists of five members: Park Cho-rong, Yoon Bo-mi, Jeong Eun-ji, Kim Nam-joo and Oh Ha-young. Originally a seven-piece group, Hong Yoo-ky