Aoi is a Japanese cooking enthusiast and student who has been given the gift of seeing yôkais, supernatural creatures from Japanese folklore, by her deceased grandfather. She therefore makes a habit of preparing meals for these mythical entities.
One day, while minding her own business, a powerful yôkai appears before her, claiming that her grandfather owes her an astronomical debt. To settle this debt, Aoi must marry the yôkai, a proposal she firmly opposes. Instead, she offers him a job at the inn he owns.