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--
If he'd alerted me that he knew about 
the examination on the first day,
Hätte er mich am ersten Tag gewarnt,
dass er Bescheid weiß,
Si hubiéramos hablado de esto
el primer día,
S’il m’avait ainsi interrogée
dès le début,
Se ele tivesse me falado que sabia
sobre a inspeção no primeiro dia,