I recommend "Back to School: The Dream Guy, Fall in Love" to you. Although it wasn't a simple cross-over novel, the female protagonist also had a plot similar to a woman cross-dressing as a man. She wanted to be with the girl she liked in school as a man. The female lead was a brave and cute girl, and the male lead was also very charming. If you like this genre, this novel should be very suitable for you. I hope you like my recommendation. Muah ~