The Ballad of Odette and Odile

Or alternately named, White and Black. Life isn't fair. These four know it better than others. (Un)Luckily, they have each. Hogwarts look out, chaos, riot, discord and pandemonium are on their way. Slytherin Like!Harry & Psychopath!OC with a cocktail of death, underage drinking and character bashing that is sprinkled with minor characters taking the stage by storm. Definite AU.