Undefeated Hollow Devil Chronicle

Nhazul, who was a prince from the Empire that was destroyed five years ago due to the revolt, met with the princesses of the new Kingdom, Lizsharte and Rias, by accidentally breaking into the bathroom of the girl's dormitory. The ancient weapons found from the ruins, the Drag-Ride. Nhazul was now known as the "Stronges Undefeated Emperor"