Chasing after 1 particular craving~ (M for F)

Hi there! Recently I've hatched up an RP idea that I'd really like to try out. It's probably pretty niche in what I'm looking for, but I hope it strikes interest in some people!

My idea is that a group of girls (2-4 college aged or slightly older, I could be convinced to try with 1 if the other aspects strikes your interest!) live together. One of them found a little trinket of a demon holding a beautiful gemstone and brought it home. That night she has a dream she was fucked by a demon, waking up to find it wasn't quite a dream, but she has no explanation for how exactly it happened. 

Soon after her roommates experience strange encounters with tentacle monsters, other demons, monsters, etc, slowly corrupting them all into some demon's playthings.

This is a new idea, so I'm open to discussion! Looking forward to trying this out.