Hogwart's Dirty Little Secret

Adabelle, a little hybrid girl who has one of the sweetest hearts for a creature of her type is sold to Hogwarts,along with many other slaves to some of the lucky students of the older years,the choosing hat doesn't only pick what house you go into,but who is your master/mistress,the slaves go to some of the oldest of the students which have to stay in rooms with each other despite their house or gender.