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