yep! east asian countries as a whole don't have the Judeo-Christian belief of impurity or shame associated with faeces or gas. It's a common topic in Japan and Korea, people will literally say stuff in public like "I got mad diarrhea today" and it's completely normal lol.
This is peak and all, but I hope that either Kaii-san will become a human or that Asuka will become an entity, or something similar anyway, because what if Asuka grows old and dies and Kaii-san stays as is :(
I had given up on this years ago, but I came back and found out there's a second couple... ate their chapters up!!!!!