Also known as: 東方智霊奇伝, 反則探偵さとり
(Touhou Chirei Kiden Hansoku Tantei Satori)
An official Touhou comic published on Comic Walker. The story is written by ZUN (Artist), with illustrations for the first 11 chapters by Ginmokusei and those after by Akimaki Yuu. It focuses on Komeiji Satori's endeavors as a detective, solving mysteries around Gensokyo.
In actually though, it is a chase after the newly introduced Miyadeguchi Mizuchi, wherein she gets away all the time.