The girl group, MYSTERY, which has remained unpopular even after three years together, suddenly announces their separation on their third anniversary. The first team, known for its hot and sexy style, is led by the original captain, Windy. However, the new captain, Wangshu, with her sweet and lively image, has been appointed unexpectedly. Wangshu appears to be obedient and sensible, always clinging to Windy, but it seems she harbors special feelings for this "jiejie"...