No, that's just Mahiro never learning to go to the toilet on time and Neko's fetish/quota of one piss chapter per volume, Momiji isn't on the drug and has pissed herself a bunch of times and is saved from doing it this chapter by Mahiro.
Nayuta should not be taught to be a mesugaki, though that Mesugaki is right that an adult (Mahiro) loses to children.
Yandere Momiji is one step closer to her rampage.
I think you're reading into it too deeply. It's a pretty niche genre with a lot of cancelled series, it might've failed in popularity polls or been cancelled so series in more popular genres could be given the page space or as Kaneko Naoya is changing publishers because of a failing out with...
Thanks for the translation, shame it was cancelled but not that surprising given he gave it all away that the plot was going to be:
The cast was too big, the pacing too slow, it had an interesting idea and concept but didn't go quick enough with it and none of the characters who were turned...