Prologue
As far as shops went in the Human Village, Suzunaan was... Rather unique, as far as things were considered. Though a majority of the books that lined its shelves were simply works from the Outside World, there were more than a few that were a bit too dangerous to leave out for most of the other residents of the village to see.
Of course, this one was no exception.
The shopkeeper, Motoori Kosuzu, was well aware of how dangerous some of those 'demon books' could be, but the way that this book was written was... Odder than most of what came from the Outside World. On the surface, it was a normal book, but upon using her own ability on it, the young girl was surprised to see that it held a record of Gensokyo that seemed inherently different from what she knew.
Her first instinct was, of course, to ask around; after all, Hieda no Akyuu was a good friend of hers, and if anyone was to know what this sort of thing meant in the first place, it would be her; failing that, the local schoolteacher was particularly knowledgeable about the history of Gensokyo, and being able to correct all of the oddities or disposing of the book entirely would be simple.
That, however, was when the trouble began. Once Keine had taken a brief look at the odd document, she had promptly fallen comatose, and though Akyuu had not fallen victim to whatever had taken the schoolteacher, the own copies of the records she had written that were being stored within Suzunaan seemed to change—in front of their very eyes, no less!
As these odd distortions began to build up within Suzunaan, small parts of Gensokyo, almost so indistinguishable from the places where they were situated, began to shift in turn. These mild oddities might not have seemed entirely odd to most of the youkai that lived here, but in a place as small as this, information traveled fast.
This was the beginning of an incident—no more, no less.
It's a Touhou RP! You know, I don't know why I decided to spin this up, but here we are. I'm not really sure how to explain things, but I'd recommend checking out the Touhou wiki if you need any sort of refresher. Ideally, everyone's already got some experience with Touhou already, but that's a bit of an aside.
I'd prefer keeping to (mostly-)canon renditions of canon characters if possible, though depending on what might have been adjusted for headcanons I'm willing to shift one way or another to let things through. OCs are going to be a bit more scrutinized depending on what is posited, though, but that's a bridge I'll cross when I come to it.
With regards to the incident itself: the idea is that the cast will be going out to handle these distortions, which end up plopping them into 'parallel' versions of Gensokyo. It's up to them to figure out what the sub-incident there is and resolve it before heading right back home. Think of it like how you might a Touhou fangame, I guess.
I suppose that's all the formalities aside; if you've got any questions, feel free to ask. In any case: form.