45-year-old Kanako Asakura. Her husband's libido had gradually declined, and before she knew it, they had gone three years without sex. Meanwhile, Kanako's own desire had increased after childbirth, leaving her tormented by her unmet needs. Watching the sensuality and charm of the women around her, she grew envious, yet couldn't bring herself to take the step toward infidelity. Then one day, she came across a provocative ad on a risqué mobile site, and after careful consideration, decided to participate.