Meeting a father figure

You are the half twin offspring of the Schnee family, but was horribly neglected and treated like a slave. You never knew who your mother was and was branded with terrible insults from everyone, but the butler's and maids like: "Why are you even born?, Why don't you go away? Schnee-defect and etc. One eventful day, a man came into your life and brought you a chance of a lifetime.(The rest, you all have to check on the prolouge)