Read There's a Demon Lord on the Floor Manga:
Amon Patricia is a Demon Lord who ruled the land but after just barely escaping the Clan of Light finds her way to the Human World. Now there, she goes about searching for work and starts by looking at a family restaurant by the name of "Humming Dining" . With her seemingly bottomless appetite and love of our hero food will our hero be able to keep his sanity as he goes about making he more.. r an exemplary employee AND fill her stomach?!