The boy-school Ryo transferred has a strange system, “Hime” (princess). a student who is chosen as Hime must be disguised in woman’s clothes at every opportunity in order to add beauty to manly life. Ryo is selected as the candidates for Hime. At first, he refuses, but knowing that Hime has various privileges, he makes up his mind to become it.
Descriptions taken from AniDB.net