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--
It's a lot of work for a yokai 
to leave the Underworld.
Für einen Yokai ist es viel Aufwand,
die Unterwelt zu verlassen.
Es laborioso
que un yokai deje el inframundo
É muito trabalhoso para um
yokai deixar o Submundo.