Y/N L/N, a human who believes in Fallens, Devils, and Angels exist and fought a war in the past. Deep inside him is a dragon name Vamellian, the Black Dragon Emperor. Unlike his friend, Issei Hyoudou, Y/N is not a pervert. He is kind and respects woman in their privates. He got the attention of Rias Gremory. Join Y/N and watch as he becomes a devil and be powerful as Ddraig ever exist in the Underworld Story Inspired by: The Black Dragon Emperor of Death (@Fireslash97) The Blue Dragon Emperor (@Terminator5765) The Void Dragon Emperor (@Nightmarefredbear666)