Dragon of Rias (DXD)

At the end of battle between the supernatural factions and The Beast, Trihexa, uptill that point and died in the hope to weakend it or maybe just hurt it. A Young Brown Haired Boy, stood up one last time with the will and power to make the finale hit, but at a grave sacrifice that would cost him his life, his memories of his friends, familie and his Red Haired Beauty, but that for him was okay as long as they where still alive.
The battle had ended, at the cost of many, but one loss hit and hurt more then the rest of dead.
In his sacrifice, his life long partner decided to make one himself, to grant him a new life, but no longer as human.

I don't own DXD or any of the charcaters, I just wanted to finally get this idea out of my head and onto paper, or Screen in this case.