Makeup saleswoman Miki Sato begins using her prized big breasts as a weapon to boost her sales performance. As her popularity soars, she flaunts slippery, wet see-through displays for male customers and supervisors drenched in sweat, lotion, and oil. Embarrassing erotic scenes unfold, such as having toner sprayed onto her blouse, giving product demonstrations in sheer lingerie, and performing penetration demos with dildo molds slathered in lotion. Her allure is further heightened by mature, sensual acts like grinding and handjob, showcasing the deep eroticism only an experienced woman can possess.