"Anyamaru Tantei Kiruminzū" is a 26-episode anime series that blends elements of magical girl, detective, and slice-of-life genres. The story centers around three sisters—Riko, Rimu, and Nagisa Mikogami—who stumble upon a mysterious device called the Kirumin Device. This device allows them to transform into animals, specifically kittens, puppies, and rabbits, granting them unique abilities. The sisters use these powers to solve mysteries and help others in their community, often encountering strange phenomena and supernatural occurrences.

The Mikogami sisters live in a small, peaceful town where they attend school and lead ordinary lives. However, their discovery of the Kirumin Device introduces them to a hidden world of magical creatures and enigmatic events. Each sister has a distinct personality: Riko, the eldest, is responsible and level-headed; Rimu, the middle sister, is energetic and impulsive; and Nagisa, the youngest, is curious and imaginative. Their differing traits often lead to humorous and heartfelt interactions as they navigate their dual lives as students and amateur detectives.

The series is episodic, with each episode presenting a new mystery or challenge for the sisters to tackle. These range from helping classmates with personal problems to uncovering the secrets of magical creatures that appear in their town. The Kirumin Device plays a central role, as the sisters must learn to master its abilities while balancing their everyday responsibilities. Over time, they encounter other individuals who possess similar devices, leading to alliances and rivalries that add depth to the narrative.

As the story progresses, the sisters uncover more about the origins of the Kirumin Device and its connection to a larger, mysterious organization. This overarching plotline gradually unfolds, providing a sense of continuity and intrigue amidst the episodic structure. The series maintains a lighthearted tone, emphasizing themes of family, friendship, and teamwork, while occasionally delving into more serious and emotional moments.

The characters’ growth is a key aspect of the series, as the sisters learn to work together, overcome challenges, and understand the responsibilities that come with their newfound powers. Their interactions with classmates, family members, and magical beings further enrich the narrative, creating a well-rounded and engaging story. "Anyamaru Tantei Kiruminzū" offers a mix of adventure, humor, and heartwarming moments, making it an accessible and enjoyable series for a wide audience.