On her way home from club activities, Mao notices a cell phone ringing from the bushes on the sidewalk and instinctively picks it up. The call is from the owner of the item, and Mao kindly decides to deliver it to the address the man specifies. When Mao goes up to the man's room, she drinks the tea he offers her and loses consciousness. Taking advantage of Kokoro, the despicable man puts Mao to sleep, imprisons her, and plays with the girl's innocent body. After relentlessly playing with her genitals and experiencing her first pleasure, the man gradually comes to dominate both Kokoro and body...