Manga takes place in Gensokyou, the setting for most of the Touhou games. Obviously Touhou games related.
It's story of 3 fairies and their daily tricking to visitor of Hakurei Shrine, getting revenged, and so on.
Touhou - Memorizable Gensokyo (Alternate Story)
Touhou Bougetsushou - Silent Sinner in Blue (Alternate Story)
Touhou Bougetsushou - Tsuki no Inaba to Chijou no Inaba (Alternate Story)
Touhou Sangetsusei - Oriental Sacred Place (Sequel)
Touhou Sangetsusei - Strange and Bright Nature Deity (Sequel)
