Nozomi, a married woman, lived happily with her three children. Nozomi was dissatisfied with the softness of her husband's crotch, and one day, by chance, she saw her son's crotch. His penis was completely different from her husband's, and seemed hard. From that day on, Nozomi became obsessed with her son's penis. And finally, Nozomi reached for her son's crotch. Her son, who had a vague idea of her actions, took an unexpected action...