Akira Shiraishi, a boy widely regarded as the -princess- in his all-boys high school, Dankaisan, decides to pursue Mizuki Sakurazaka, the -prince- of the neighbouring all-girls Saint Nobara High. Concealing his true sex to most of the students at St. Nobaras, he even manages to join Mizuki s band, the -Blue Roses-. Mizuki, priding herself to be a tough tomboy, soon finds herself at a loss: Should she maintain her reputation as a -bish?nen- and prince in her school, or should she accept Akira, who never fails to make her feel like a woman every time they were alone? Also, would Akira be able to keep his true identity a secret among the girls of St. Nobara, while his schoolmates wish to retain their princess?