Anri has moved to a rented apartment in Y City, K Prefecture, to live with her lover whom she promised to marry. She immediately went to say hello to the "Kousaka family" who lived next door to her, and met Reiko, her mother and daughter who lived there. But at this time, she was unaware of Henri. A suspicious light shines in the depths of Reiko and Koto's eyes... And a few hours later, she had an experience that she had never experienced before. Henri returns to her home shivering. But the tragedy doesn't end there...
