A lot of interesting doujins out there showing how it was for Sanae to move to Gensokyo. One that I remember is how her mom "doesn't believe" anymore, but still kinda sent her off. I think it's a kimono? Actually, I think it's by azmaya (WaHH artist)... Eeeyup.
And there's also one from Zounose, but that's more on Kanako and Suwako – though I think the new works he made this year include what seems to be this topic too?
Correction: The end of the first paragraph should be "... in her room at her house in ██████"