Waka Misono, an honor student raised in a privileged and comfortable environment, lived a life without want. However, her life takes a drastic turn when she accidentally catches her neighbor masturbating. Forced by the man, she is lured into sex and ultimately raped. In the midst of this ordeal, she becomes aware of her deeply hidden masochistic side. Submitting to the man, she continues to engage in repeated sexual encounters with him. Gradually, she is trained and molded into a true female sex slave.