Rie, a stage actress, still thinks about Fuyuki, who dumped her ten years ago and ran off with her best friend Nanako, whom he then married. After a chance reunion, the two's relationship flares up, but when Rie tries to tell Nanako about the mistake they made that night, their bodies and minds end up swapping! With the performance of the play fast approaching, what will happen in the battle between the wife and ex-girlfriend over one man?