Yoshio Yoshida, an office worker who enjoys going to cosplay cafés in his spare time, hears a rumor from a familiar café girl about a "concept café with a weird atmosphere" that had opened in the neighborhood. Intrigued, Yoshida visits the café and finds three unmotivated, blunt, and highly idiosyncratic café girls. In fact, they are a real demon, dwarf, and elf...!?

(Source: Kadokawa, translated)