Two X (Korean: 투엑스; an acronym for Top (T), Win(W), One(O), and ‘X‘ signifying ‘multiply) is a South Korean quintet girl group. The group consists of Jiyou, Eun, Minjoo, Surin, and Eunyoung and debuted on August 16th, 2012, at Mnet MCountdown Music Show. They have released two singles, "Double Up" and "Ring Ma Bell", the latter charting in Korea.