A yokai named Egen is scheduled to visit the mundane world.
Egen, who dreams of establishing a school in the Underworld, will be observing Abeno and Ashiya's high school for a limited time. Ashiya does his best to help Egen. However, Abeno's foul mood leaves Ashiya bewildered.
There's something bothering Abeno about Egen's visit, but Ashiya is completely unaware of what that is--
But how much will it cost to create 
a similar facility in the Underworld?
Aber wie viel es wohl kosten mag, in der
Unterwelt eine ähnliche Einrichtung zu errichten?
¿Cuánto presupuesto necesitaría
para crear unas instalaciones así?
Quels fonds seraient nécessaires
pour le recréer dans le monde caché ?
Quanto custará criar uma
escola parecida no Submundo?