Gravure model Jun arrives at a beauty salon unaware that its selling point is its "erogenous development program." Despite the dubious explanation and embarrassing questionnaire, she decides to undergo the treatment, hoping for results... Before she knows it, her entire body is covered in oil, her sensitive body is massaged, and even her erogenous zones, her breasts and genitals, are stimulated with the suspicious oil, forcing her to develop her sexual sensitivity. The pleasure is so intense that she loses consciousness and loses her reason! Eventually, she finds herself asking for the next program. She squirts violently, arches her back violently, and climaxes violently! The increasingly escalating erotic drainage program pushes Jun beyond her limits...