Sanada Chihiro

Mizuho's younger sister. She is single. She is an office worker at a prestigious company in Tokyo and works as a section manager for a woman led company.

She is beautiful, but has no experience with men due to her man-crazy personality and natural dislike of men. On the other hand, she has a strong desire for sexual intercourse.

Being a virgin at her age has become a complex for her. She is on her way to becoming a very perverted masturbator.

She has a strong complex as well as admiration for her older sister, who is well-liked by everyone and has achieved happiness through her early marriage.