A World Without Harry Potter

Harry has been missing for two years and he won't be picking up the broken pieces of his old life. He has returned to Hogwarts with a seemingly insane goal in mind - wooing Severus Snape. He'll have to get creative if he wants to succeed but he's come up with a rather ingenious plan to start over anew. What could possibly go wrong? Slash, Smut, Harry/Severus, Manipulative!Harry