A married woman invited on a hot spring trip has gone along with abnormal sex acts thinking of her husband's pleasure, but gradually begins to feel uneasy. Craving normal sex, she steps into an affair. Though she always wears a cheerful smile, the moment she's kissed in an outdoor bath, her expression shifts to that of a lustful woman. She turns aggressively passionate, sucking the man's cock deeply and taking his shaft into her hairless pussy outdoors. After dinner, she fondles him, wanting to make love like lovers do, writhing and convulsing each time he thrusts into her. The next morning, they indulge in intense sex once more before she heads home with a bright, satisfied smile.