"Interspecies Reviewers Comic Anthology: Darkness" is a spin-off collection of short stories set in the same universe as the original "Interspecies Reviewers" series. The anthology explores the diverse and fantastical world where humans and various mythical species coexist, focusing on the interactions and relationships between characters in adult-themed establishments. The narrative maintains the comedic and lighthearted tone of the main series, with a strong emphasis on humor, fantasy, and the exploration of interspecies dynamics.

The anthology features a rotating cast of characters, including familiar faces from the original series such as Stunk, Zel, and Crimvael, as well as new characters introduced in each story. Stunk, a human adventurer, and Zel, an elf, continue their quest to review brothels and other adult venues, often accompanied by Crimvael, an angel with a curious and sometimes naive perspective on mortal desires. The stories delve into the unique traits and customs of different species, highlighting the cultural and biological diversity of the world.

Each chapter presents a self-contained story, often centered around a specific establishment or a particular species. The plots range from humorous misunderstandings and misadventures to more reflective moments that explore the characters' personalities and relationships. The anthology also introduces new species and settings, expanding the lore of the "Interspecies Reviewers" universe. Themes of acceptance, curiosity, and the celebration of diversity are woven throughout the narratives, often underscored by the characters' interactions and the comedic situations they find themselves in.

The artwork maintains the vibrant and detailed style of the original series, with a focus on character designs that reflect the wide array of species featured. The anthology's episodic structure allows for a variety of tones and settings, from bustling urban brothels to remote, exotic locales. While the stories are primarily comedic, they occasionally touch on deeper themes, such as the challenges of interspecies relationships and the societal norms surrounding adult entertainment in a fantastical world.

Overall, "Interspecies Reviewers Comic Anthology: Darkness" serves as an extension of the original series, offering fans additional content that explores the rich and varied world of interspecies interactions. The anthology's episodic format and diverse cast provide a fresh perspective on the established universe, making it a complementary piece to the main series.