One day, the world's common sense changed. It became a world where it's normal for the girl next door to sleep well when she takes a nap. "My daughter is napping right now," says Sakura Hanamura, the married woman from next door who suddenly visits. She leads you to her house. "Come on, it's common sense, right? When a girl takes a nap... you know?" "The man from next door helps her sleep well."