Thirty-year-old housewife Haruka Nanasegawa wants to make her own choices instead of living under her husband’s control. Her husband, twelve years her senior, treats her like a child and restricts her every move. During a trip together, she lies to the jealous man for the first time, sneaking out in the early morning and late at night to cross the line into adultery. Intense cunnilingus leaves her writhing with a blissful expression, and the guilt only heightens the thrill as she repeats her first affair across three passionate sex scenes.