Reverse threesome training repeated in a home with no way to escape! After her husband's death, Natsuko discovered a large amount of debt and was unable to even pay her rent. However, she could not bring herself to tell her daughter Ayaka, who was working hard at university, about the debt, and had promised her landlord to wait for the rent payment. However, the landlord fell ill and was hospitalized, and instead, the landlord's son, who had been arrested for rape, came to collect the rent and ended up raping both Natsuko and her daughter Ayaka at the same time...