(That earlier synopsis was definitely something I wrote while my brain was fried.)
It's just the story of a boy's life with everyone in Gensokyo.
Joy and pain never go together, even if pain is always hidden beneath joy.
Peace and bloodshed are always at odds, but only bloodshed can bring peace.
This is a tale of Gensokyo, where someone who has forgotten the past bears the surname Watatsuki.
Don't forget: Gensokyo, beloved by the gods, was built from the presence of every one of its residents.
(There is a lot of original content, but it won't disrupt the inner workings of Gensokyo, daze.)