While Shari is trained to embody a sadistic persona for a demanding client, Natsumi is lured into the industry after a staged arrest. Upon discovering that her sister, Sana, is already working to pay off their father's massive debts, Natsumi is manipulated by the trainer into joining her. Driven by family loyalty and her own emerging desires, Natsumi ultimately agrees to undergo training alongside Sana to satisfy a client's specific fantasy of having two sisters.