So, perhaps not exactly a futa, but pretty much the same. The story I've got in mind revolves around Molly, a 17 year old trans gendered girl. She was born male, but started hormone therapy just before puberty, so her body is almost entirely female. Except for, well you know. She recently transferred to a new school and, while having to deal with the typical problems of being the new kid, has to figure out dating and even sex.
I know this is barely a sketch of an idea, and a lot less detailed than the things I normally post. If you think you'd like to play opposite her, or a similar character, if you have a plot idea that she would fit into, please PM me