Apink (Hangul: 에이핑크; Japanese: エーピンク) is a six-member South Korean girl group under Plan A Entertainment (formerly known as A Cube Entertainment). The groups consists of six members: Chorong, Bomi, Eunji, Naeun, Namjoo and Hayoung. Yookyung left the group in April 2013. They released their first mini-album Seven Springs of Apink on April 19 2011, and rose steadily in popularity. Their official debut was April 21, 2011 on M! Countdown.