In her third year of marriage, Haruka usually enjoys trysts with her sex partner at love hotels, but this time, with her husband away on a business trip for two or three days, she decides to take a rare trip to a hot spring. At a private open-air bath, she indulges in passionate play, blowjobs, and cunnilingus with her lover, enjoying a steamy day of infidelity. Back in the room, they go at it again after dinner. Amid the liberating atmosphere of the hot spring, their relationship grows even deeper. Meanwhile, Sumire, now in her fifth year of marriage, has fallen into a sexless relationship and feels neglected by her husband. Irritated and lonely, she sets off on a solo trip to relax. She calls for a massage to ease her fatigue, but the masseur's suggestive touch stirs her desires, and she gives in, letting the session escalate into a special, intimate massage. Two women, each in different circumstances, experience erotic moments in their own ways.