The day before he begins attending high school, Ashiya Hanae becomes possessed by a strange fuzzy yokai. Being possessed causes him to fall ill, and while spending the start of his high school life repeatedly making trips to the nurse's office, he comes across the contact information of the Mononokean, which specializes in exorcising yokai, and decides to call them. When Ashiya finally visits the Mononokean, he meets the morose master Abeno Haruitsuki.
Most people in this world can't see yokai.
Die meisten Menschen
können Yokai nicht sehen.
La mayoría de las personas
no ve a los yokai.
Très peu d’habitants du monde réel
voient les esprits.
A maioria das pessoas do mundo
 não consegue ver os yokai.