A Bit Bitter, Bibliomania. / Go Forth, with Brownies.
Mullin visits the Pandemonium Library along with Azazel and runs into the sleepy bookworm, Dantalion, as well as the ancient demon, Moloch, who always tends to talk in a loud voice. Later, Belphegor wants to come up with an excuse to talk to Azazel, so she starts making brownies with Beelzebub.
Aired 08/11/2018EP 5 - A Bit Bitter, Bibliomania. / Go Forth, with Brownies.

2018
As Miss Beelzebub Likes it.
Murin's lands his dream job with the demon king he's always held in awe, but when his tenure begins, it turns out the demon king isn't quite what he expected...
(Source: Yen Press)