Ihata, Natsumi

Natsumi is a teacher in her early to mid-twenties, but unfortunately for Tomonori, she is engaged to be married. Tomonori loves older women, and Natsumi, his teacher, is the girl he is in love with.
In the anime, Natsumi sometimes accidentally gets involved in some of the backhanded schemes that the main characters are playing against each other, and on one occasion, she tried to have sex with Tomonori, but the effects of the drug wore off before anything could happen.
She is a kind woman and is thick-headed when it comes to romance. She cares for all of her students, and when it comes to teaching, she is very self-conscious.