The erotic and beautiful body of KANBi's exclusive actress, Rumi Orikasa, blooms... Rumi, who lives with her high school son, makes a living working part-time at a supermarket, but she also works at a health club to earn a higher income for her son's future. One day, her son's homeroom teacher happens to pass by the shop and discovers the truth. To keep him quiet, she has sexual relations with him. Having gotten a taste for it, the teacher encourages Rumi's son to pursue higher education and suggests that Rumi, who is struggling financially, transfer to a soapland. The stimulation in this new land, which she never experienced at the health club, releases her from the guilt she felt toward her son, carving into her a woman's pleasure that goes beyond just 'work'...