The Takeuchi family runs a massage parlor. Lately, the husband has had erectile dysfunction and premature ejaculation with bland sex. Rie, in her prime, is not satisfied with their nightly marital life. Meanwhile, their daughter and son-in-law have come home for a visit. Rie decides to give her son-in-law a massage to help him relax. As they chat and she massages him, she feels something unusual in his crotch. It's noticeably bulging, and Rie's heart skips a beat. That night, Rie wakes up and heads to the living room. Along the way, she sees her son-in-law masturbating in the changing room. Knowing it's a natural male instinct, she tries to look away but can't take her eyes off his vigorously thrusting member and the white fluid dripping from it. Before she knows it, her hand has moved to her own crotch. She snaps back to reality and quietly leaves. The next day, her husband and daughter go out together. Rie invites her son-in-law for tea but finds him napping. As she gently covers him with a blanket, she can't help but think about what she saw yesterday. On a whim, she pokes his crotch, which gradually grows harder. Rie can't hold back any longer and pulls down his pants. She is drawn to his crotch like a magnet, licking it fervently. At night, her husband and daughter's family go out drinking. Alone in the quiet bedroom, Rie thinks about her son-in-law's powerful member. As her excitement reaches its peak, she hears a commotion—her husband and daughter have returned. Her drunk husband is being helped to bed by her son-in-law. After putting her husband to bed, Rie sighs to him, 'You're such a troublesome person.' Her son-in-law responds, 'Well, mother-in-law isn't any better,' and embraces her. Though her husband is sleeping right there, Rie anticipates being held by her son-in-law, her heart racing...
