Hello! I've recently remembered a manga that I've read awhile ago. I think it might've been a collection of dark stories. They're not romance or adventure, just the type of random stories that don't really make any sense on the outside.

I remember one chapter where a pregnant woman doesn't want to give birth because she doesn't want her child to go in the world or something like that. She ends up raising him in her body while he grows older (he's shown in her mouth when she opens it and she feeds him that way) and one day, years later, she says that it's time for him to go outside. When he crawls out of his mouth, he's a grown man who has long hair.

Thanks in advance

I remember a chapter like that from Collapse of the World as We Know It from its early chapters.

Yes, this is the manga that I was looking for. Thank you so much!