Inui

The adult man who cares for Mana. He hosts the appraisal meetings, runs the sex-education lessons, and has sex with Mizuno.

Akasaki Mana. After her parents died in an accident she lives with her uncle and joins the appraisal meetings, spreading her vulva, urinating on command, and receiving penetration.

A junior-idol girl with a princess-like look who appears on TV. At the appraisal meeting she leads sex-education practice, spreads her vulva, and demonstrates fellatio and penetrative sex.

A boy from the same class. Brought into the appraisal for the first time, he inspects Mizuno's genitals, touches Chika and Mana, and attempts penetration.