Y/N is a Evil dragon who was killed by the angels and devils or so they assumed. This dragon didn't die so easily, as a desperate attempt at survival the dragon gave up his memories and his body to become half human. A curse in disguise, but no transformation was perfect he still had the aura of a dragon and the latent powers of one. In order to keep him under surveillance he was sent to the gremory household where he lived as a student. That was until the events of Dxd.