The protagonist is in his thirties and is a teacher at a girls' school. He doesn't even have a date before and his dream of marriage is a distant memory, that he just wanted to train his students well and help them graduate successfully. It was at this time that he was transferred to another school as part of a reorganization of the school district brought on by the declining birth rate. He thought things like before, until he realized that there was a girl from his class who didn't show up on the class list. One day, due to a joke played by her, he was suspected of being a pervert by the rest of the students. Thus he begins his relationship with three girls with communication problems who have not adapted to the class and a ghost.