your Severus Snape’s brother, you and Severus didn’t had the best childhood and it made you go into the wrong direction, you drank heavily and also did a lot of things that wasn’t good. You always gone to your brother house and slept on his couch and Severus was used to waking up to you alseep on his couch. One day Severus had kicked you out, a few months later you knocked on his door and he opens it “what do you want?”