High School DxD culminates with Issei Hyoudou and Rias Gremory solidifying their bond. Issei's growth into a powerful devil earns him recognition alongside Rias, leading to their official engagement.

Fans in Japan will be able to get a small Rias Gremory poster on April 8 in Akibahara ... by a busty classmate of his named Rias who is a devil herself, and she contracts the boy to become ...