Shimai Ijiri / Slave sisters

Yukari Isshiki from childhood believed that her whole life would be filled with endless fun and happiness. After all, it couldn't be otherwise - she grew up surrounded by loving parents and her beloved younger sister Miku. She had everything until a misfortune happened... 

In an instant, poor Yukari-chan lost everything - her home, parents, and her freedom. She and her sister Miku inherited a huge debt to a large criminal cartel from their deceased parents. The representative offered the girls only two possible ways to solve the problem - become sex slaves or die. Yukari was left with no choice, and now she has to live a life she couldn't imagine even in her worst nightmares. The training of the sister slaves will be handled by Shinju-kun - a former psychologist who takes on such work only because of a hopeless situation. He must train them for rich and influential gentlemen so that the girls can satisfy their most cherished sexual needs. But during training, our hero begins to feel sympathy and pity for the girls. Will he be able to make up his mind and go against the syndicate to save the innocent sisters?