Chika

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.

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

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.

Chika's father and the school vice principal. He attends the appraisal, helps explain sex education, and touches the girls' genitals.