I'm Sayuri Sato, 40 years old. I have been married to her husband for 12 years. She has no children and lives with her husband. At that time, one month ago, her younger sister started living there. Unlike me, her free-spirited sister walks around her room naked in front of her husband, and her life rhythm goes crazy. Recently, it seems that the distance between her sister and her husband is getting closer. At that point, I heard her sister's obscene voice from the room...
