Yuuna is a wife living happily with her husband Ryo, who is much older than her. She is not dissatisfied with their peaceful days, but the only thing she feels dissatisfied with is the lack of sex at night. One night, when Yuuna asks her husband for sex, he coldly rejects her, and she can't help but express her dissatisfaction. Ryo, excited by having his pride hurt, forces Yuuna to take his cock in his mouth and plays with her body roughly. For the first time, Yuuna is ordered around by her husband and experiences the joy of submission. Since then, she has come to derive pleasure from doing what her husband tells her to do...