Kana, who lives with her husband, is frustrated by the fact that her husband is busy with work and rarely has sex with her at night. Meanwhile, Nakano, who lives with his girlfriend and is timid, has sensitive nipples, and is a male college student with an insatiable sexual appetite. When the two meet, a sexy chemical reaction occurs! The lewd wife finds the perfect cheating partner, but it turns out to be a sex monster wife who doesn't care if her girlfriend is there, but instead kneads her nipples and milks her sperm...