"Jimi Hime to Kuro Neko no, Enman'na Kon'yaku Haki" centers on the life of Yuki, a high school girl who is often overlooked due to her plain appearance and reserved demeanor. Despite her unassuming nature, Yuki possesses a kind heart and a strong sense of responsibility. Her life takes an unexpected turn when she encounters a mysterious black cat named Kuro, who reveals himself to be a supernatural being. Kuro offers Yuki a deal: he will grant her a wish in exchange for her assistance in breaking a curse that binds him to his feline form.

As the story progresses, Yuki learns that Kuro was once a powerful sorcerer cursed by a rival. The curse not only transformed him into a cat but also stripped him of his magical abilities. To break the curse, Yuki and Kuro must navigate a series of challenges, including confronting other supernatural entities and unraveling the mysteries of Kuro's past. Along the way, Yuki begins to discover her own hidden strengths and gains confidence in herself, challenging the perception others have of her as "plain" or "ordinary."

The narrative explores themes of self-discovery, resilience, and the complexities of human relationships. Yuki's interactions with Kuro and other characters, such as her classmates and rival suitors, add depth to the story, highlighting her growth and the evolving dynamics between them. The series balances moments of humor, drama, and supernatural intrigue, creating a compelling blend of genres. Through their journey, Yuki and Kuro form a unique bond, challenging societal expectations and uncovering the true meaning of strength and identity.