Jun, who has a preference for older women, harbors intense admiration for Maika, the mother of his friend Kyosuke. Drawn to her voluptuous figure and gentle, warm personality, he desires a closer relationship with her. Inviting the mother and son on a camping trip, Jun seizes the opportunity by suggesting Maika join him at a nearby hot spring to prepare. Surrounded by warmth, he uses the mixed-gender bath as an excuse to enter together. Overcome with excitement, he forcefully takes her lips in a passionate kiss. Though Maika struggles to maintain her composure, captivated by the young man's fervor, her body—awakening to sex after a long hiatus—succumbs to raw desire.