Ann runs a 60-year-old public bathhouse inherited from her grandfather together with her husband. However, business has been declining, and with her husband hospitalized after an accident, both their livelihood and the business have become increasingly dire. That's when a regular customer suggests "introducing a new service." While super bathhouses are thriving, he proposes an overwhelming service to compete with them... Hesitantly, Ann begins the body-washing service the man suggested, but as the male customers' expectations and joy grow, her services become increasingly extreme...