MILF Kumiko (temporary name), after divorcing due to her husband's infidelity and inability to conceive, plans a solo hot spring trip. Previously married to a younger, newly-hired nursery school teacher, she now works at a childcare facility and seeks new excitement. During her journey, a young staff member gets drunk and passionately embraces her, awakening her suppressed female desires. A kiss ignites uncontrollable arousal, her body responding intensely to every touch. Stimulated by his erect cock, she convulses, reaching climax after climax. The film portrays their passionate, intimate encounter—two people alone, lost in pleasure, immersed in the hot springs.