Mizushima Kaho

A girl who attends Seika Girls' Academy, famous for being attended by the daughters of wealthy families.

She has a quiet personality and doesn't like to stand out, but shortly after entering the school she is approached by Kurose, a Kurodome student, and accepts his invitation.

She has never masturbated and is ignorant of sex, but after Kurose takes her virginity and she serves the Kurodome students, she is developed both physically and mentally.