Goshhh, I don't know anything about Touhou Proyect, but I freaking loveee thissss, It felt so sweet and it even reminded me of my first time with a girl hehe
Embrace the Touhou fandom, and a million OTPs shall be yours.
But do I have to play all the games? Where do I begin? T.T
And... does this game have canon yuri couples??
I really don't know anything lol
touhou is somewhat loose with canon and how the characters act and look. touhou fanworks are even more varied. you'll catch up on stuff by just reading various comics. just know that some interpretations of character personalities won't be fully supported by games or officially affiliated comics.
basically, it takes place in the land where things go after they've been forgotten which is why there's monsters and myths everywhere and they all get up to trouble and mischief of varying degrees of severity