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.
I'll be a loner. A gloomy 
high school life awaits me.
Ich werde einsam und allein enden.
Ein tristes Oberschulleben erwartet mich.
Me quedaré solo. Me aguarda
una vida escolar muy triste.
Je serai le mec à part,
qui s’amuse jamais au lycée…
Vou ser solitário. Uma vida 
colegial sombria me aguarda.