A female student, Shiori, has a relationship with her teacher, Takuma, and promises to marry her after graduation. On her last summer vacation as a student, Shiori came to Takuma's parents' house. She starts with Shin'ichi, who is like an elder, and Takuma's uncles and cousins come and go. She thought that scene was a kind of relatives peculiar to the countryside, but... This village was a devil's paradise where the obscene custom of 'tasting' the woman who would become a bride with all her relatives was rampant! Shiori who is played with the body in various ways. When she notices, her masochistic nature blooms, and she begins to desire fornication herself.
