A Study in Symbiosis

When a Slytherin is made Head Girl and a Gryffindor Head Boy, cooperation becomes difficult. When that Slytherin is Carina Malfoy, and that Gryffindor is Florizel Granger, cooperation becomes impossible. However, as both their lives outside Hogwarts turn for the worse, they naturally seek warmth in each other. Yes, this is a genderswapped Dramione story. AU, with fem!Harry as well