You are back in the days before the Battle of Hogwarts. which you are over 50 years old You want to change the past so Voldemort doesn't rise again. And save other people's lives so that no one dies

Snape doesn't like you at all. He even hates you for one reason..Your last name is Potter You are the son of James Potter and Lily Potter Snape. There is a problem with your father even though you father is dead