Hitomi, a beautiful wife with a faithful and quiet personality, loves her husband, Tetsugaku, who was a former colleague of hers, and lives a life of luxury. However, her husband is busy with work, and they have not had a baby as planned. Meanwhile, Hitomi has become more sensitive recently, perhaps because she is at an age where her sexual desire is increasing, and her nipples in particular have become more sensitive. She would masturbate with her nipples in between housework, but one day, her husband brings his subordinate home and the situation changes.