Isshiki Yukari always believed her life would be full of laughter and happiness. Surrounded by her parents and younger sister, Miku, she seemed to have it all. But that was before... before it happened. In an instant, Yukari lost both her parents and her freedom. Inheriting a massive debt to a powerful crime syndicate, she was given only two options for her and her sister: become Sex Slaves, or be killed.

Forced into a life they never imagined in their worst nightmares, Yukari and Miku's innocence is about to be shattered as the two sisters enter into a world of lust, debauchery, and cruelty. Under the guidance of Shunji Iwashiro, a sex slave trainer, they will be taught everything from public humiliation and S&M to anticipating any possible sexual craving their new masters could imagine. They'll be trained to please. Please their clients, their trainer... and even each other.