I have a question for you folks regarding my PPC writing.

Some of you might remember my PPC interlude Whispered Tales from last year, a horror story about a response center known as RC 1000, which sometimes vanishes and reappears and has some pretty messed-up stuff inside. Originally, I was going to expand on this story and write about my DIA agents' response to such a phenomenon, but yesterday I had an idea for an original fiction novel that is basically RC 1000 in a different environment. Now, I super don't intend on stealing any PPC stuff for my own writing, don't get me wrong. The only things in common between the PPC and my story would be that the heroine finds a disappearing office at her workplace which has weird stuff inside, and that there would be a secret organization at her workplace, dedicated to figuring out the mystery of that office (sort of the DIA if you squint, but with a much more specific goal). My own story would be very different in tone and setting and completely serious, so it wouldn't involve ideas from the PPC universe in any way. But I'd feel very bad if I didn't ask you folks first whether it's okay to turn a PPC story into something else, even if I wrote that story myself.

Thoughts?