Married for 15 years, they had no children, but Misho (Minato) was living a relatively happy life. However, her life changed drastically when her father-in-law Akira's dementia worsened and she became overwhelmed with caring for him. He would occasionally mistake her for her deceased mother-in-law and would approach her in a sexually harassing manner, until Misho finally let out her anger at Akira. However, Akira mistook even this for his wife being upset and pushed Misho down. Misho was shocked to the point of being insanely sexually proficient at her father-in-law, which was inappropriate for his age...