I don't remember where it came from either, but it's supposed to be from an author named "Zeron." They have two stories in TGStorytime.com, one of which can also be found on Fictionmania.tv. Neither is this story, however.
I have a folder with a few stories by this author, for some reason some of them are in ODT (LibreOffice) format, others are in EPUB, and yet a few others are in HTML inside ZIP files. If it helps any, the EPUBs and ZIPs are dated almost exactly from 2 years ago (November 6, 2023) while the ODTs are dated August 3, 2024.
Looking inside the structure of the EPUBs, it looks like the stories were published on Google Docs and I chose to download them in several different formats. I have no idea why the ODTs have a different date.