Nagai's ecchi parody of Jiro Kuwata's Phantom Detective (Maboroshi Tantei)

A dormitory climbing school that consists of junior high and high schools in the mountains of N prefecture. There was another No. 1 in this school with the No. 1 advancement rate from the University of Tokyo. That is the highest crime rate in the school. Kotobuki, who is in charge of the school police, starts a detective activity in the name of Maboroshi Panty to help her father.