Savanna and Nikki Johnson are the daughters of the Minister of Magic in America. The witchcraft/wizardry schools in the states aren’t boarding schools, and the girls don’t get along by any means. It was really no surprise when they were sent to the best boarding school daddy could find, Hogwarts. It actually worked out better when Savanna was sorted into Slytherin and Nikki was put in Gryffindor. Both of them attract one guy, though one sister plays hard to get, the other just plays dumb. AU to HBP, sorry.