Summary:

Himenogi Marimo desperately wants to become an idol singer. When a TV contest for would-be idols is announced she begs her friend and neighbour Fujimura Ayumi to perform as her partner. Ayumi agrees and he and Marimo enter the singing competition as a duo with Ayumi disguised as a girl. Surprisingly, they win and are signed to a recording contract as a new group called "Twinkle". Now they must keep their hordes of fans (and everyone else) from finding out that Ayumi is actually a boy while steering their way through their showbusiness debut.