/jp/ - Otaku Culture

For most Touhou doujin or a fanfics, they're usually something of a oneshot, almost never done in a real setting, neither canon nor AU. Even when it's clear that it's rather different from canon, these differences are almost never elaborated on.
Here's a hypothetical - a doujin about Rumia opening a cafe in Human Village, even now I believe someone could write something like this. Why is she allowed this? Why are there undisguised youkai in here, including Rumia herself? Why are villagers alright with this? What's the Human Village's tax policy? The author will never tell us, because the point is "Roomba a cute", not worldbuilding.
Very few fanworks really get into the "meat" of Touhou-based worldbuilding, which I think is a strange, considering how many fans just straight up ignore canon in favor of their own interpretations, and yet they never get to making their own Gensokyo, which I thought was the whole appeal of this sort of thing.
So, what do you think about this? Do you know any fanworks that got their own worldbuilding? Do you have your own ideas about reimagining the setting / guesses to fill the gaps in canon?