From the introduction:
In a mysterious space between dimensions, exists a brothel. This brothel houses clients and prostitutes aloke from an endless variety of strange species that you could only dream of finding in a fantasy novel. These countless different species come to the brothel for the pleasures of the flesh, with such biological diversity on display, not all clients are quite sure how to accomplish this, and those who do often have rather odd tastes. Worry not, because an unlikely mixup linked the brothel to the bedroom of a young girl, named Makura, or Maki, for short. She may think herself plain, but this girl belongs to one of the most sexually talented races this brothel has ever known: humans. Maki is more than eager to help, and in no time at all, will make a name for herself as the brothel’s star prostitute and interspecies sex expert!