Nana Usami enters the home of a man and his son as a housekeeper. A devoted maid, she begins by diligently handling daily chores. Soon, the three of them start living together, and the man begins seeing the image of his late wife in Nana. Meanwhile, the son grows resentful of his father's behavior and starts to regard Nana as his own possession. As tensions rise, the twisted relationship between the three takes a dramatic turn, leading to intense scenes of humiliation, rape, and passion, culminating in powerful female ejaculation.