A series of danmaku shooting
by one guy under the name ZUN. He is worshiped as a God on many image boards who view his work as some of the best shit ever.
Basically the game involves you flying around as a loli dodging bullets of many a color (blood red, royal blue, cum bubble
white, etc.) while laying
the beat down on other lolis who want
to destroy you for their own personal gain. Usually.
is popular mainly
because of the HUGE amount of fan works and shit other people put out for it, doujins, fan games, and even a trading card game. Tons of inside jokes revolve around the series and charicters and a lot of it is frowned upon outside
the small circle of fans
by people calling
players and fans
of the game "pedophiles" and "touhoutards" /a/ and /v/ boards on 4chan say they hate it but only
because the majority of them suck nuts at it.
There is a Touhou
Wiki and a deticated Touhou