Touhou Bougetsushou: Tsuki no Inaba to Chijou no Inaaba
Touhou Bougetsushou is a series of comedic 4-koma strips drawn by Toshihira Arata and serialized in Manga 4-koma Kings Palette. Unlike other Touhou print works, ZUN is credited as "原案" (the base of setting and character design) instead of "原作" (scenario).
(Source: Touhou Wiki)