Can you save me?

Sophie and Keefe were best friends as children, they would play all day hiding from their parents in the woods whenever they possibly could. They were inseparable and even neighbors but Sophie did seem a little off sometimes... One day she disappears without telling him goodbye, and his parents tell Keefe Sophie's family moved away. Keefe is shattered at first and never quite moves on from his first heartbreak and the fact that he still misses his best friend very much but it has been years since that incident and is learning to slowly live with it it now. That is until the first day of year two everything changes when Sophie comes back... What will happen?
(Human AU) (Art Isn't mine! Credit to them unfortunately I couldn't find their name)