Ghosts or Gods, I Run 'Em AllEP 3

Labeled a zero-mana loser, a delivery boy stumbles into a supernatural bureau. Yet, a terrifying Ghost Queen claims him as her husband, a nine-tailed fox shields him, and the icy boss demands his company! Jealous, an arrogant heir unleashes a doomsday spell. As gods despair, the "loser" stops it with one finger. Who is he really?