Yukie's daughter, Seika's childhood friend Shinya, who is one year older than Seika. From a young age, Shinya had been looking after Seika as her tutor, and Yukie thought of him like a son. Shinya, from a single-parent household, also saw Yukie as a mother figure. However, as he grew older, Shinya began to realize the mistake in his feelings towards Yukie. "Not as a mother but as a woman..." As his love and possessiveness for Yukie grew stronger, sadistic and twisted desires started to sprout within him...
