Wife Kana Morisawa's ex-boyfriend from three years ago shows up to drop off her drunk husband. The man, who's still deeply in love with Kana, takes advantage of the sleeping husband, forcefully kissing her, making her grip his bare cock, and cumming in her mouth with a blowjob. Her sex life with her husband has become mechanical—rimming, 69, rough doggy-style sex ending in creampie—but she feels increasingly detached. Meanwhile, Kana finds herself drawn back to her ex. Finally begging, "Make love to me...", she climaxes intensely in a vigorous standing doggy position, surrendering to the pleasure of their illicit affair.