A debt-ridden man is recruited by a Yakuza associate to become a "sex trainer" for an exclusive club that tailors women to the specific desires of wealthy clients. Under the guidance of the commanding Sakura Matsunai, he begins training a desperate young woman named Sana to help her settle her family's debts. After discovering Sana's potential and learning the ropes from Sakura, the trainer commits to the job to clear his own financial burdens.