Even if I didn't properly read the text (I skimmed it), I think the rest of the chapters were interesting, but typical and stock standard.
introduce the other characters, brief backstory, die, etc.
However, the villain backstory was kinda mid imo.
Maybe it's just my villain type preference or I went into this story with the wrong expectations for this kind of story premise.
I don't know if it was due to the author being made to do a rush ending but for stories that end their story with a total of about 20 - 30 chapters
I feel that
Kami-sama no Iutoori or
Ousama Game series did far much better.
I suppose this manga was more about the "mystery" than the main family, since I felt that there wasn't much of an attempt to develop reader attachment towards our main "heroes".