Manami and Ai meet again at a class reunion for the first time in seven years. Ai, who has been hiding a deep affection for her since their school days, invites the unaware Manami into her home... Manami, who is troubled by family discord due to her husband's layoff, is caught in an Kokoro gap and ends up having sex with Ai. Once Manami has experienced the boundless pleasure of two women having sex, she decides to live with Ai for a while due to family circumstances. The two enjoy their secret relationship that seemed like it would last forever, but...