Keitarô Nakamura

Gin is a 15-year-old boy. He knows that his father is a gay and he wonders if he might be the same. Narumi is a 15-year-old girl. Her mother tells her she should prostitute herself. Narumi decides to go to her father in Tokyo. Gin tells Narumi that he is going as well. The two 15-year-olds set out on a trip to Tokyo.

The eldest daughter of a rural family Mon returns home from Tokyo pregnant after an affair with a college student Kobata, which causes a scandal that will threaten the marriage prospects of the younger sister San, in her cash-strapped family. The ill-tempered eldest brother Inokichi decides to take on the role of disciplinarian, with harrowing results.