Assigned to the secretary department for five years, Wakana has always worked quietly and diligently as a proper office lady—but behind her composed demeanor lies a hidden secret. Since joining the company, she has been engaged in an affair with her boss, repeatedly used by middle-aged men over the course of five long years, her heart stolen by the forbidden pleasure. Behind the facade of hard work, she remains unable to break free from this relationship. Once again tonight, alone together in the late-night office, she indulges in lewd overtime. Unable to bring herself to end this ongoing affair, her quiet exterior masks a burning, passionate desire.