Your mother disappeared randomly. Your two brothers are complete arses. So you just decide to run away.

You go in the train station, seeing a mother shouting and crying, saying her son is in the train. You shrug it off and go on the train, choosing an empty cabin. Well, you thought it was empty, until you see a knife sticking out of a bag. It then falls, and then you see a boy going out of it as if it was nothing. He groans and gets up, then sitting in the seat infront of you.