A married woman named Ayumi feels empty due to her sexless marriage. Although she relieves her sexual desires through masturbation, she cannot alleviate her loneliness. Meanwhile, her stepson catches a glimpse of her erect penis. Before she knows it, she blurts out, "Should I help you jerk off?" From that moment on, the two begin their forbidden relationship. Ayumi is captivated by his young and vigorous body and eventually experiences the joy of having semen deposited deep inside her vagina...
