Fan Casting Sinned Blood/Living With The Vampire Brothers

Sky is a human girl with witch lineage that gets sent to live with 7 vampire brothers. The brothers each have different hair colors that represent their individual powers. 4 of them were born vampires and 3 were turned. The story follows Sky living with them, going through hell, and then coming out stronger and more powerful. It also slowly turns into a love story between her and many of the brothers, in a poly-open kind of thing.