Nice that Mimimi got her own series, she's a good lass.
Not that important but I much prefer the art style in this series over the one in the main manga; kinda fits better with the image you get when reading the LN.
This is a criminally unrated manga. I've never said that about anything I've ever read before, but even 2 chapters in it's clear this deserves more than 8 stars, when it has under 8. People I have terrible taste to rate this so low.
IMHO this is significantly better than the main story. Part of that is probably how it was a very-limited run and the story was told quickly without having a chance to start dragging.