Himeno has transferred to a former boys' school, called Hallelujah, which has only recently become co-ed. This, however, means that very few females knew that they could enter the school, and Himeno, aided by a scholarship, is the only female student. The president of the students association, Gaou, is an extreme misogynist, and the relationship between the two becomes intense. Himeno needs help—but where to find it in a school full of rowdy, rude men?