A married woman's heart and body tremble on a hot spring getaway. With a natural figure and cheerful, carefree personality, she lives as a full-time housewife consumed by raising two children, gradually losing the excitement of daily life and intimacy with her husband, leaving her feeling lonely. It's in this emotional state that she steps into an affair. Upon arriving at the inn, she warmly plays the role of a gentle, nurturing mother, serving handmade sweets. Yet, when a man finally approaches her after so long, she shyly opens herself to him. Her pent-up body, once mounted, sways violently with desire, craving pleasure. Moaning like a wild animal, she passionately indulges in the thrill, losing herself in ecstasy.