Each morning as the woman awakes she forgets everything that happened the day before. Because of this she doesn't know she is, where she is or how she came to the place she fell to sleep.
I have pictured this game to be somewhat of a mystery game in which she tries to find out who she is and maybe find a cure for it. Problem will of course be... is a day enough before she has forgotten everything again and has to start everything up again.
I of course what a writing partner for this, someone that will be holding a "gamemaster" role but don't fell pressed that you have to have a character of your own... if you want one sure no problem though.
How much sex this game will hold... well no idea. Probably some at least, would be rather dull without it