Minato has been married for 15 years, but although they haven't had any children, they have been living a happy life. However, her life changed completely when her father-in-law Akira's dementia worsened and she was forced to take care of him. Misto sometimes mistakes Akira for her late mother-in-law and approaches him in ways that are similar to sexual harassment, and in the end, Mito takes out her anger on Akira. However, Akira mistakes this as his wife's displeasure and pushes Mito down. Mito is shocked to the point of madness by his father-in-law's sexual prowess, which doesn't suit his age...