When Kana was attending a nursing school, she met Kousuke and began dating him. After gradating and working at a hospital for a year, the two got married. With her earnest, cheerful, and friendly personality......She was living a fulfilling life.

At her hospital, emergency patients are not uncommon――

However, one night......The emergency patient that comes to the hospital is someone whom she met when she was a student, before meeting Kousuke, a man she was dating, Takigawa Daiki. Although being his lover is just a façade. Because in fact, she was an outlet for his desires, treated as a sex slave――

But for all that dark periods in her life which she keeps hidden, there is one thing in her current life that is a dissatisfaction, her sexual desire. Her body feeling flustered, unable to resist her lust, and wanting her desire to be fulfilled, Kana returns to being Daiki's sex slave once again.