Harry Potter and the Vampire's Ring

The summer after fifth year is interesting for Harry. He wakes up in a stranger's bed, loses his virginity and is transformed into a vampire. Not only that, but an accident and a ring suddenly make him more than just the Boy-Who-Lived. Now he's royalty. But with the war starting, he has other obligations. And on top of that, his Defense professor is looking pretty fine. A/N:SLASH!