The Nishino couple moved to a larger room, thinking about fertility treatments and the future. The neighbor is also a good person and tells them a lot about the neighborhood. If there's one complaint, it's sex with her husband. She wasn't satisfied with her husband, who finishes too quickly, and spent her days distracting herself with masturbation. One day, she was told that her voice was leaking from the neighbor's house, and she wondered if she would be warned...