Ok, now that
@UbelBlatt did the missing chapter, it's finally complete, thanks for the hard work.
The First Case isn't perfect and is very fast by the end, but I always had a soft spot for it, I see lots of people angry Ayaka didn't get the kind of comeuppance they wanted, but I'm fine with what she got, Okatani got his little Kokone and ended in a better place.
I do enjoy some harsher consequences too for people who cheat, but I feel Okatani managed to turn things around quick enough before he was too damaged by what Ayaka did, that's why I'm fine with what she got.
If you people are that thirsty for harsher consequences for cheating spouses for check
Saretagawa no Blue, a complete manga that's officially licensed, this one can even make you a little sad for the antagonists due how screwed they get by end, but you always remember how bad they were to the main characters early on so the sadness washes away, and
Jinsei Gyakuten, the latter is especially insane, the levels of consequences teenagers who weren't even married go is cosmic karma levels, but that's in the Web Novel which is pretty far ahead, the manga version hasn't got anywhere near those events yet.