High School DxD: Ouroboros

"Promise me... that you will never leave me."

He had been nothing more than a starving child abandoned by the world. No family. No Sacred Gear. No destiny waiting for him beyond dying alone in some forgotten alley one day.

Then he met her.

A strange little girl with endless grey eyes who sat beside him in the cold and accepted half of his stale bread. Forevermore would the world be changed that fateful night..... a series of events that would span eternity.... All because on one rainy night.... a lonely child chose to share his food with an equally lonely god.

"I promise.... I'll be right here."