In a world where prostitution is legal, there exist many brothels run by "succu-girls" of pretty much every species. Stunk the human and Zel the elf argue over who is better between a 500-year-old elf woman and a 50-year-old human, asking friends from other species to give reviews on them. The two soon rescue an angel named Crimvael, marking their new friendship by treating him to a catgirl succu-girl. As Crimvael takes up a job at the Ale & Eats tavern, Stunk and the others takes inspiration from the tavern's waitress, Meidri, and try out a birdwoman brothel, firmly establishing themselves as the Interspecies Reviewers.