Kyouka Ayakashi Hichou

This story is based on the life of the famous historical author, Kyouka Izumi, who wrote about the fantastic in the Meiji period. In this manga, Kyouka writes for the Fantasy Club magazine, and he encounters many supernatural, often onmyoudou-related, incidents. Together with his managing editor Masumi Kouzuki, other friends and colleagues, and his own mysterious abilities, Kyouka tries to find a way to resolve each mysterious situation.

(Source: MangaHelpers)