Sayama joins a construction company through an employment office, but she is a sullen, inexperienced former shut-in who constantly makes mistakes and never apologizes. Her body, however, is spectacularly mature, and her supervisor becomes obsessed with the large, firm breasts and ass peeking from her work clothes. Pretending it is training, he begins sexually harassing and groping her. With no social experience and no idea how to react, Sayama cannot firmly refuse, and her body gradually starts craving the pleasure. Before long, her boss is groping, fucking, and creampieing her whenever he wants during work, turning the new-hire program into degrading sexual conditioning that leaves her completely submissive to pleasure.