Kanna, a married woman, grows tired of her distant husband and has gone over a month without sex. Frustrated and craving intimacy, she meets Kimura, her husband's friend who visits the same esthetician. Excited by his large cock, she can't resist and gives in to forbidden desires during a massage session. Thus begins a passionate affair between them. Using her big ass to seduce, Kanna indulges daily in illicit trysts with Kimura. This is the story of a lust-filled married woman giving in to her deepest urges.