The Sun Can Burn Without Touching

Although people go about their day as they always do, in the midst of the hustle and bustle, another world lives within it unseen. It's the Afterlife; the place people go to once their time in the Mortal Realm is done. Kyra Averell works in the Afterlife as a Reaper. She's been there since the beginning of time and has guided people into the next plane of existence. For centuries, she's worked with the Greek underworld system and Summoned the people on the List (provided by Hades himself) - the believers of Greek myths, Gods and legends. And for centuries the world's stayed in balance as souls moved on, without a hitch (mostly.) That's until the name of Mason Greenwood appears on her List.
Thinking nothing of it, Kyra does her job as she's always had, but then a discovery is made - the Summoned Mason is not the correct one. He's a mistake, and this simple error tips the delicate scales on which the world sits. As Kyra's unable to restore his soul back into his body, it being beyond the limits of her powers, Hade's instructs her to await his return, while he deals with his temper-tantrum throwing brother Zeus in Olympus.
Reluctantly (not that she had much of a choice), Kyra is relieved from her duties as a Reaper and has to take care of Mason while keeping their mistake under wraps. And although all beings in the Afterlife follow the rules of cosmos, the beauty of humanity is, it doesn't. Humans are impulsive (sometimes more than Gods), and Mason pulls Kyra into his scheme of finding out the truth themselves.
Together they'll travel through the Afterlife, meet Gods and nymphs and Titans, and maybe, after millions of years of Summoning souls and bringing them into the Afterlife, Kyra Averell, the embodiment of death, just might figure out what it is to truly live and be human.