Touhou - The SDM!

This video is rather peculiar because it has no lyrics, just music. Actually most of Touhou arrangements are just music, but they are not that popular. I love this video because it just takes up tons of references from Touhou, other games, shows and just about everything (just like any Touhou video, anyway). Oh yeah, The SDM is the Scarlet Devil Mansion, where Sakuya, Remilia, Flandre, Hong Meiling and Patchouli live.