Urged by her husband, Makoto, Aoi visits her father-in-law's house alone. There, she encounters her father-in-law, Ryozou, who has just returned from three months of tuna fishing in a state of extreme sexual frustration. Mistaken for a housekeeper, Aoi cannot resist Ryozou's fierce, starving desire and is forcibly embraced. Aoi becomes intoxicated by his wild masculinity, which her husband lacks, and his attentive care in serving her freshly caught fish. Taking advantage of Makoto's absence, she sinks into a sea of immorality, and three months later, she returns without hesitation to her father-in-law, where her lust awaits.
