"Nekojiru Manju" is a surreal and darkly comedic manga series created by Nekojiru (Chiyomi Hashiguchi). The story revolves around two anthropomorphic cat siblings, Nekojiru and Nyatta, who embark on bizarre and often unsettling adventures. Nekojiru, the older sister, is brash and impulsive, while Nyatta, her younger brother, is more naive and gentle. Their dynamic is central to the narrative, as they navigate a world filled with strange occurrences, grotesque imagery, and dark humor.

The plot is episodic, with each chapter presenting a self-contained story that often defies conventional logic. The siblings encounter a variety of eccentric characters and situations, ranging from mundane tasks like shopping or visiting a theme park to more surreal and disturbing events, such as encountering malevolent spirits or transforming into inanimate objects. The tone shifts abruptly between whimsical and macabre, creating a sense of unpredictability.

Violence and death are recurring themes, often depicted in a matter-of-fact manner that contrasts sharply with the otherwise childlike art style. Characters, including Nekojiru and Nyatta, frequently suffer gruesome fates, only to reappear unscathed in subsequent chapters. This cyclical nature of harm and recovery adds to the series' dreamlike quality.

The manga also explores themes of existentialism and the absurd, with the characters often questioning their reality or purpose. Despite the dark undertones, there are moments of genuine warmth and humor, particularly in the interactions between Nekojiru and Nyatta. Their sibling bond, though tested by their chaotic environment, remains a consistent thread throughout the series.

"Nekojiru Manju" is notable for its unique blend of innocence and horror, creating a distinctive narrative that challenges traditional storytelling conventions. The series' unconventional approach and striking visual style have made it a cult classic, appealing to readers who appreciate its blend of whimsy and darkness.