Percy and Annabeth get sucked into a black hole, sending them back in time into their 12 year old selves.

Percy Jackson is broken. After the Giant War, Camp Half-Blood's protective barriers were destroyed, and he was the only one who escaped. He watched his friends and family be slaughtered by an army of monsters, and he has nothing left to lose. When Professor McGonagall comes to ask if he could teach a class called Defense Against the Dark Arts in a school called Hogwarts, he agrees. But there was one thing that will be difficult- not revealing that he is a demigod. Will he keep the secret, or will the year end in disaster? I do not own the Percy Jackson series, Harry Potter series or the characters in them. They are owned by Rick Riordan and J.K. Rowling.