Yukari Issiki from childhood believed that her whole life would be filled with endless fun and happiness.
After all, it could not be otherwise - it grew surrounded by loving parents and beloved younger sister Miku.
She had no misfortune yet ...
In an instant, the poor Yukari -chan lost everything - the house, parents and her freedom.
She and her sister Miku, by inheritance from the deceased parents, crossed a huge debt to a large criminal cartel.
A representative, who was proposed by the girl only two possible ways to solve the problem - to become sex slaves or die.
Yukari left no choice and now she has to live a life that she could not imagine even in the worst nightmares.
Shinju-kun, a former psychologist and taking such work only because of a hopeless situation, will take up the training of sisters.
He is obliged to train them for rich and influential gentlemen so that girls can satisfy their most cherished sexual needs.
But as the training, our hero begins to experience sympathy and pity for girls.
Can he decide and go against the syndicate to save innocent sisters?