Highschooldxdoc storie

(This story was inspired by Fate: Bonds Beyond Humanity by Apprentice of life) (While this story is primarily a DXD there will be other anime in this story as well) Tori...

The story of Kairu Nozokimasu, as the grey dragon Emperor, on his quest to settle the raging Issei Hyoudou, and become the forbidden GreyDragon God Emperor