It couldn't just be simple

MoD!Harry; Time-travel fic! Harry has lived out his life unaware of his mastership over the hallows. So when Harry finally passes on he's as surprised as anyone (and quite annoyed) to find he's not allowed to move on. Instead, Death takes him back to his own past - who knows what will happen? Rated T for swearing, may increase but I'll try to keep profanity down