The hidden desires and thrill lurking within an ordinary-looking married woman. Despite having no dissatisfaction in her marriage or financial motives, she seeks only pleasure and excitement, leading her into adultery. Bathed in the spring sunlight, Naomi Wakatuki blushes in the outdoor hot spring, her beauty glowing. Married three years ago to a husband nearly two decades her senior, she should be content both economically and emotionally—yet something still feels missing. That unfulfilled longing deep inside drives her toward a new path.