In the Clear Moonlit Dusk 1  (English, Paperback, Yamamori Mika)

Yoi Takiguchi's long legs, deep voice, and handsome face are the perfect recipe for an attractive guy-until people realize she is, in fact, a girl. Dubbed a "prince" by her peers since childhood, Yoi has all but given up on being seen as anything else. That is, until she bumps into Ichimura-sempai, the school's other prince (who's a he) and gets a taste of what it feels like to be seen for her true self. The story of the two high school princes starts here!