Keiko, a Japanese language teacher, is about to marry a fellow teacher and finds deep fulfillment in her profession. Her fiancé, however, grows dissatisfied with teaching and begins talking about changing careers. Meanwhile, Keiko learns that the school custodian, Ukai, is an aspiring writer, and the two grow closer. She soon discovers that Ukai writes erotic fiction, and as she becomes immersed in his stories, she gradually transforms, adopting the boldness of the novel's heroine. As Keiko's desires awaken, the story explores her inner conflicts surrounding love, career, and personal identity.