>>11303986
I'm sorry anon that I can't help you but there are only 2 stories that feel similar to what you're saying.

This
https://e-hentai.org/g/3073958/75e88aeda7/

And other story that is just a short horror story about very old lady who tricks small child into preforming astral projection where she steals her body
Btw if anybody cares i'm currently writing a ,,Mass Body Swap/The Great Shift " story in TAWOG, here's the sneak peak of commision