Ojou-sama wa Otoko no Ko? ~Meika no Himitsu~

Yuuji Terajima transfered schools to the quiet countryside. A quick survey of his "competition" and the boy was sure he'd be top of class in no time. But a student named Haruka beat him out. For the first time, Yuuji was second place.

Miss Haruka was the privileged daughter of a powerful local family. She was highly respected for her pedigree and parentage.

Yuuji was soon exasperated, unable to compete with such excellence. He obsessed over her, and that's how he discovered she had a secret. But what were its contents?

What was she hiding? Quite literally, it turns out, she was hiding a penis.

Miss Haruka was actually a crossdressing boy.

And oh, what she'll (?) do to keep it her secret under wraps!

[From DLsite English]