What I gathered from this chapter are:
-Netherworld has 13 months (that is why Kirio's bday is on 13/13) https://twitter.com/osamun24/status/1335531652299116544?s=20
-Demons can marry either genders
-Lied-kun's will power stronger than expected, he was able to not fall too much to that evidol lol
-Gyari IS the other girl standing after the hell dance! The one that Kuromu mentioned during practice
-Iruma is a competitive boy ehehe