These are the 25 best "Romance" manga/light novels that I have read. I will continue to update the list as I read more.
Main plot or important subplot involves secret powers, secret identity, body switching, secretly crossdressing, acts differently in different situations.
Manga I'm still in the process of collecting.
The Dreaming (OEL)
Princess Ai: Rumors from the Other Side
Some mangas that I own (Complete, or just parts)