Guardian in Exile: The God Eater's Hellion

A warrior angel breaks a Celestial Edict, thinking it's the right thing to do. He's caught, exiled to Earth, and placed in the body of an ordinary man where he must stay until there are no more humans. Existing rather than living, plotting revenge, and running a bookstore, this is how his story might have ended, but one blustery day a beguiling young woman, packing supernatural firepower, waltzes ...