Touhou Sangetsusei ~ Eastern and Little Nature DeityTouhou Sangetsusei: Eastern and Little Nature Deity ; 東方三月精 ～ Eastern and Little Nature Deity

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.