飯山 正樹

A second-year student attending a Tokyo academy. Short in stature and giving off a somewhat frail impression (but with a huge dick). He's clumsy at sports but decent at studying.

He doesn't have any particular talents, but his small-animal-like, wide-eyed, wide-eyed look seems to tickle the maternal instincts, making him popular with girls for some reason.

However, until now, his sister always kept a close eye on him, so he never had a girlfriend or any special relationships with girls.

His nickname is Maa-kun. He has a latent sadistic tendency, and with his sister's cooperation, this tendency gradually blossoms.