Information And Backstory

Y/n L/n a 19 year old boy who attends Kuoh academy, while everyone thinks he's just an normal boy he is something more powerful than anyone could think of, he was the ultimate dragon slayer Dovahkiin, only he and his friend Serana who happens to be a vampire, after saving the earth from the dragon's both have nothing to do , that's until the dragon's come back sooner than expected, how will Rias and the others react, when they find out that a living legend goes to the same school but also has more power that all of them could ever hope to have......