"Mythical Beast Investigator" is a fantasy manga series that blends elements of mystery, folklore, and adventure. The story is set in a world where mythical creatures, known as "Kemono," coexist with humans, often leading to conflicts and misunderstandings. The narrative centers on Ferry, a young and skilled investigator from the Order of Magical Beasts, an organization dedicated to mediating disputes between humans and Kemono. Ferry is accompanied by Kushuna, a powerful and enigmatic Kemono who serves as her partner and protector. Together, they travel across various regions to resolve incidents involving mythical beasts, uncovering the truths behind these conflicts and striving to maintain harmony between the two worlds.

The series explores a variety of cases, each involving different Kemono with unique abilities and cultural significance. These cases often delve into the complexities of human-Kemono relationships, highlighting themes of prejudice, coexistence, and the consequences of fear and ignorance. Ferry's role as an investigator requires her to approach each situation with empathy and a deep understanding of both human and Kemono perspectives, often challenging societal norms and preconceived notions. Kushuna, on the other hand, provides a contrasting viewpoint, embodying the raw power and primal instincts of the Kemono while also displaying a sense of loyalty and protectiveness toward Ferry.

As the story progresses, the duo encounters increasingly dangerous and morally ambiguous situations, revealing deeper layers of the world's lore and the intricate dynamics between humans and Kemono. The narrative occasionally shifts focus to secondary characters, including other members of the Order of Magical Beasts and individuals affected by the conflicts, adding depth to the overarching plot. The series maintains a balance between episodic case resolutions and an evolving central storyline, gradually unveiling the mysteries surrounding the origins of the Kemono and the true nature of their connection to humanity.

The artwork complements the narrative with detailed depictions of mythical creatures and lush, atmospheric settings, enhancing the immersive quality of the world. The character designs reflect their roles and personalities, with Ferry's practical and understated appearance contrasting with Kushuna's more imposing and otherworldly presence. The series' pacing allows for both action-packed sequences and moments of introspection, creating a well-rounded exploration of its themes and characters.