Yoko Narumi is Sayuri's younger sister. Sayuri was divorced 20 years ago and she lives with her only son, Kenichi. Yoko comes to her sister's house as soon as something happens because her sister and her house are close. Today, she found out that her husband was having an affair, and she got into a big fight, and she rolled in. Kenichi was the only one at home, and he pounced on Kenichi as if he hadn't cheated on him because his husband had cheated on him.
