Yoshika, a young wife desperate to have a child, is shocked by the report from her husband's hospital examination: 'No sperm.' After much deliberation, the couple decide on an unconventional solution: sex with Yoshika's father-in-law. The father-in-law is taken aback but starts seeing his daughter-in-law as a woman from that day forward. One day, he peeks at her in the bath and becomes excited, taking advantage of his son's absence to have sex with her. However, two elderly friends catch him in the act. These men have been eyeing Yoshika's voluptuous body and ask the father-in-law to 'let us help get her pregnant,' then use aphrodisiacs to rape her. Initially confused, Yoshika gradually begins to enjoy it, even actively seeking out the old men's penises. One day, she is gang-raped by the three old men in front of her husband, who ignores her as she orgasms repeatedly, no longer caring about getting pregnant…
