Shinya is one of Yukie's daughter Seika, one older than her. From a child, Yukie has been thinking of Shinya as a son, who has been taking care of Kiyoka as a tutor. Shinya, who is a single-parent family, also thought Yukie was like a mother. However, as she grew up, she realized that she had a mistake in her feelings towards Yukie. "As a woman, not a mother... 'As Yukie's possessive desire to love grew, sadistic, twisted desires began to emerge within Shinya...