Manami and Ai reunite at a class reunion after seven years apart. Ai has secretly loved her since their student days, so she brings the unsuspecting Manami home. Troubled by marital conflict after her husband loses his job, Manami is emotionally vulnerable and lets herself be swept into sex with Ai. Once she discovers the endless pleasure of being with another woman, she cannot forget it. Family circumstances lead her to move in with Ai for a while, and the two revel in a secret affair that seems as though it could last forever—but...