Fukurai Naho

Is a staff of the university's student affairs office. She is also a graduate of the seminar, Tatsuhiko and others attend.

Has a petite body with a baby face. Is popular as "Lolita with big breasts" among male students because of her childish behavior and huge breasts.

Although, had been going out with a boyfriend since her high school days, the relationship has turned into a rut. Dissatisfaction has started increasing.

Treats Tatsuhiko as her younger brother. Occasionally puts on an air of a senior to push around people to do her work, but is secretly a masochist. While seemingly reluctant to Tatsuhiko's demands, obidiently follows it.