Mitsuha, a normally quiet and serious girl, is a bit of a daddy's girl, but contrary to appearances, she likes older men and has been in love with the PE teacher at her school for some time. One day, unable to suppress her feelings, she barges into the teacher's house. However, the teacher is a born lolicon who aspires to become a teacher for the impure motive of getting a teaching license so he can get closer to young girls. The girl who has fallen in love with this pervert ends up being trained to get the teacher's attention...