The storyline is, my Guy and your Vampire girl were freinds, best freinds even. One day, she is ver thirsty, and the only person in sight is him. So, when she drinks from him, he obviously find's out about her, so the rest of the coven tries to kill him, and she protects him.
You will play the Vampire girl, and I'll play the Human guy, Semi advanced please :) No need for you to make a charrie, just jump in :)