One-shot. What if James Potter had a girlfriend at the time that he fell in love with Lily? It might end a little something like this. Told from OC point of view.

Rosalie Taylor caught no ones attention her first year at Hogwarts School of Witchcraft and Wizardry. And after she moved, she was only a memory. What happens when she comes back four years later, and the Marauders happen to stumble upon her compartment?