I have been looking for this manga for a long time and haven't been able to find it. It's about a young, female demon hunter that saves a fetal spirit from a monster and it enters her body to protect itself until they can get it back to its mother. I don't remember all that much about it but I can remember that there is a part where she goes to a maternity swim class in a one piece swimsuit. If anyone can help me find it I would be eternally grateful.

From what I can tell, it's from "Hell Teacher Nube 220" in which the chapter is called "Izuna, Become a Mama!?"

Here is the link of a version I had.

https://www.anonfiles.cc/file/851ef82130...ba69850a1e

That was the one I was looking for. Thank you so much!