Once upon a time-wait no

Once upon a time- wait no more like a few years ago, anyway, there were two kids, twins actually, named Shadow and Shade. They were never apart and one day they found a lonely little girl named Brook, Brooks only friend was her older half brother but he was never there much so half the time she was alone with her mother that had to work 3 jobs to support the family and her jerk of a dad, Shadow and Shade wanted to stay with the girl so they did but 4 years later something horrible happens and it changes Shadows life completely.