The adventures of Mika, running both a convention of magic users to sell spells, and a press for magical works.
We learn in the first story that her dream in starting the convention was that it would attract someone with a spell that would let her get back to her native Tokyo from this magical world, but it starts thoroughly in media res, with her having the business running full throttle, the convention about ready to run, and many friends and workers whose backstory with her is not revealed.
Episodic. Managing lines, armor, Mika's talking with someone at an unpopular table, a rush order because a spell book is needed against werewolves, a death cured by combining spells, the invention of cosplay in this world, and more. Not all the stories even feature Mika as the main character.