A disastrous book

They say you have to dream before your dreams can come true.
And that was exactly the case with Riley.

Riley Sinclair is an 18 year old girl who enjoys day dreaming and making up scenarios to compensate the fact that she doesn't have a social life. So she came up with a new version of herself, one that checked all the boxes of perfection, and she was now starring in her dreams, and the little novel she wrote when she was fourteen.
But what happens when on the first day back to school, the new student that walks into Riley's class is none other than herself?