Touhou - Gods' Happiness (Doujinshi)

[MangaDex]

 

[FioreFire]

Oh, right, it's this one. The worst ReiSana doujin.
If you like this pairing or either of these characters, save yourself some grief and just don't read this.
It's just depressing for the sake of being depressing, and the main twist is so badly contrived.