The Daughter of Darkness Loves a Blood Traitor

Sora is voldemort's daughter who has been set to marry Draco Malfoy, but as a young girl she fell in love with Ron Weasely. She transfers to Hogwarts and has to struggle being a half vampire that can't be killed, having a dead mother, a murderous father, and a love that can't ever be found out.

Watch http://www.youtube.com/watch?v=wmwM_AKeMCk
it's very potter musical :D