Ootsuki Chihiro

Gets along well with her husband. Although they get along there is a sense of inadequacy due to the lacks of ups and downs in their daily lives.

She is gentle and kind and treats her father in law gently and sympathetically because her mother in law passed away.

She thinks he has a high sense of ethics, but her sense is a little off. When the protagonist makes a pass at her, she thinks that normal sex is wrong, but anal sex "might not be cheating," and so on.

As the protagonist develops a new hole, she becomes addicted to anal sex, revealing her inner perversion and lechery.