A female customer comes alone to a mixed-gender hot spring in search of an encounter. Her big breasts and her voluptuous, sexy waist, which cannot be hidden by her towel, catch the eyes of the male customer and make him get an erection. At first, the female customer looks away shyly, but when she notices the erect penis protruding from the towel, her eyes begin to water. If a hot penis gets close enough to touch the woman's heated body, she will never refuse.