When Ashiya begins working part time at the Mononokean, the master Abeno impresses upon him that he should pretend not to see any yokai other than the Mononokean's clients. However, the kind-hearted Ashiya is unable to keep his word, and the yokai won't leave him alone. Based on their surprising strength and numbers, Abeno believes there must be a powerful demon serving as their leader.
You knew I was your classmate, didn't you?
Du wusstest, dass wir
Klassenkameraden sind, oder?
¿Sabías que éramos
compañeros de clase?
Você sabia que a gente
 era da mesma turma?