Still weird though, since Iruma himself stated that he was part of writing some of it.. I believe he was an assistant?
If he was an assistant in the human realm and the theory that Ameri's mom made the manga collection during her stay in the demon realm.. you can see where this is going.... It doesn't work nor make any sense.
It could be possible that she wrote it again in the human world and then it pop off.. With her writing it just before or during her pregnancy, Iruma ( a young child) being an assistant in part of one suggest it's still probably ongoing to this day. (Or in Iruma's day)
It could be her way to remember her stay in the demon realm.. With the very confusing, chaotic story of the manga, you could probably say she felt one hell of a ride..
Kinda dumb theory but maybe they find a way to send things back and forth from human world to netherworld and maybe merize send it for ameri cuz kids love reading mangas or something?
Believe in my dumb theory (  • ‿ •  )ᕗ
I'm still wondering about the bunch of mangas Ameri has. Where did those come from . I wouldn't be surprised if those were made by her mother, Merize, since she also drew Henry quite well hahahah