Kanae, a niece whose marriage is falling apart, moves in with her aunt, Yuka, for a while. Yuka, who has secretly harbored a romantic affection for Kanae that transcends gender, sees this as her chance to make her own... Unaware of this, Kanae falls deep into immoral acts with Yuka. Days of feeling a pleasure that only women can share, finding an eternal happiness in their emotional connection. However, they cannot stay in their own private world forever...