Rumia Kansatsu Nikki

Rumia Kansatsu Nikki is a series of dōjinshi manga created by the artist kayayan. The work centers on the character Rumia from the Touhou Project, a long-running series of bullet hell games and multimedia works created by ZUN. In the context of the vibrant Touhou dōjin community, kayayan became well-known for producing lighthearted, observational comedy that explores the daily lives of series characters, often imbuing them with distinct, endearing personality quirks that expanded upon their established traits.

The design of the series prioritizes a gentle, slice-of-life approach, distancing itself from the intense action often associated with the source material. Kayayan's style is characterized by expressive, rounded character designs and a focus on humorous, mundane interactions. Upon its release at comic conventions, the series was well-received by fans for its consistency in tone and its ability to capture the charm of the Touhou cast within a relaxed, episodic format.