HP:Descent Darkness and depravity

Harry and Luna have been together since fourth year. This is known to everyone in the castle. What is not known however, are the lengths the two will go to in order to enslave and subjugate anyone within Hogwarts and beyond its walls for their own dark pleasure. !Maturewarning noncon -I don't own Harry Potter. This story does not belong to me. The original can be found by name in the search engine.