Sarasouju: A Flower By Any Other Name

Homurako Yoshii, a country girl born and raised, transfers into an elite girls' school in the heart of Tokyo. There, she meets Sasara Takamura, admired by those around her for her brains and her beauty... but she's actually a he?! The two of them, polar opposites in both status and personality, are drawn to each other.... (Source: MangaPlaza)