I saw this prompt the same day it was posted, thought about it a good while, got writing, and ended up with a novella-length story that more or less fits. If you squint. It's kind of extreme horror/splatterpunk, though, with some Eldritch horror mixed in, so please, please mind the content warnings. If it's not for you, it's not for you. I apologize in advance, but it needed to get out. If I missed a content warning, I'm so, so sorry. Please let me know and I'll edit it in! Also, I checked the rules and didn't see anything that looked like I can't post this here, but if this is too dark for the community, I'm happy to delete it if someone gives me a heads-up!
Content warnings: violence, torture, gore, death, dehumanization, attempted suicide, kidnapping.
I might let this stew for a month or two and then do a proper round of editing, so that I can upload this somewhere for people to read an "official" version. If it's allowed, I'll link to it from here once I do :)
Feedback is always appreciated.
Have fun!
Edit: Okay, it feels a bit dumb to post everything into comment-length chunks as replies. I'll try to upload it elsewhere later and then put a link to that. For now, part 1 is in the replies here, and I'll figure out what to do about the rest after work.
Edit 2: Here's the link to the full story (without extensive editing because just getting it done already took a month since I found the prompt, haha).