bullet said:
I know exactly the one you're talking about. I don't have it backed up, or a link to anywhere that I'm sure has it... but have you asked/searched around the following:
Hypnopics Collective?
MC Garden?
Ao3? (Archive of our own)
reddit's r/girlscontrolled?
Archive.org backup of Hypnochan?
8Chan's hypno forum?
Internet archive, Ao3 and Fanfic.net. Haven't checked the rest yet thanks for the suggestions.