A thirty-year-old wife heads to a mixed-gender hot spring bath wearing nothing but a single bath towel, her voluptuous big breasts and youthful face drawing the eyes of men around her. Suddenly, a middle-aged man obsessed with orgies barges in and begins groping her body, forcibly pushing her into sex. Though initially confused and resistant, she gradually begins to feel pleasure. Meanwhile, her husband secretly watches from the shadows, his excitement palpable as he spies on the scene.