Tamotsu, the youngest son, was reckless with money and left his older brothers at home with a massive debt. With no way to repay it, the brothers demanded that Tamotsu offer his wife, Akira, to them as compensation. To fulfill this agreement, Tamotsu brings Akira back to his family home for a visit. As the entire family gathers around the dinner table and begins drinking, Tamotsu pretends to go to sleep early, just as planned. Left alone, Akira is tricked into drinking alcohol laced with aphrodisiac drugs. That night, the story takes a new turn.