I love this idea, though all my preferred spots have been taken. I saw however, that we were allowed to suggest roles to you that you may not have listed, so my suggestion (Played by myself obviously) would be a woman whom happens to be transgender and is keeping this a secret ever since her...
My interest is peaked, I will certainly keep this RP in mind. I love originality and newness, and so if this really is new and different, I'd be glad to join.