Synopsis: When Yukari and Miku's parents suddenly pass away, they inherit a huge debt to a powerful crime syndicate. Yukari and Miku are given only two choices: to be killed or to live as sex slaves forever. The sisters choose the latter option for their survival, and they are brought to their trainer Shunji Iwashiro. Shunji will educate the sisters in every aspect of sexual satisfaction so that they can be sold at a high price. But what if love gets in the way?