Kasai Makoto

Boyish physical education teacher. The advisor to both the basketball and volleyball club.
The complete opposite of Miyuki in every way, but the two are close friends. She serves as Miyuki's common sense and one who keeps her out of trouble. She has a confident personality, but is shy when it comes to love and is still a virgin. She masturbated with her mature body every night.
She is wary of the protagonist for both his reputation and that he was tailing Miyuki.