Acieth has been exhibiting strange symptoms for quite a while, and now her sister Alas Ramus’s condition is worsening, too! To aid in their care, the Devil King convinces Emi to let him stay at her apartment in Eifukucho. Between the slippers he’s been provided, the large refrigerator, and the fact there’s an honest-to-goodness bath in the place, Maou is floored by how different the Hero’s abode is compared with his spartan, one-room Devil’s Castle...as the group becomes the world’s strangest nuclear family. Meanwhile, preparations over on Ente Isla are entering their final phase. Will their ersatz rocket ship successfully take to the skies, at last enabling the invasion of the heavenly reams?
The ending of the series is getting a bit dragged out. It feels like the series which ends in the next volume could of ended a few novels ago, with some editing and/or slightly longer books.
In This volume, things are getting settled for the finale with the Devils castle going to heaven. Various fractions are getting settled and visiting the devil at his work place. Things in Tokyo are getting wrapped up and there's a big conference planned by Chiho in Ente-Isla.
The story and beats were a bit all over the place in this tome, but things did get to mash up and get together at the end. As things get close to the final battle, of course it's a bit hard to get the usual life in Japan kind of story the series got us used to, but we are getting somewhere, let's see how it ends.