A girl rescues what she thinks is a stray cat. The cat is actually a shapeshifting host to tiny supernatural creatures, and the moment she names him, he becomes real in ways that matter. What starts as a slice-of-life comfort story about adoption turns into a quiet supernatural war where the stakes are whether this new family gets to stay together, and every episode forces you to choose: is Xiaohei a pet, a person, or something else entirely that doesn't have a word in human language. The animation shifts between painterly softness and sudden violence without warning. It costs your certainty about what you're watching, and it's worth every second.
On a rainy night, a young girl named Luo Xiaobai rescues a black cat from the streets and brings him home. She calls him Luo Xiaohei. What she doesn't know is that Xiaohei isn't just any cat. His body is a living shelter for tiny supernatural creatures called Heixiu, each with their own personalities and quirks. Together, this unlikely family navigates everyday moments filled with warmth, humor, and unexpected magic. But peace doesn't last. A mysterious being named Diting emerges, commanding three fearsome winged wolves and hunting Xiaohei with unclear intentions. As threats close in, Xiaohei must protect both his newfound home and the creatures who depend on him. The series balances gentle slice-of-life moments between Xiaobai and her strange pet with genuine stakes and action sequences that raise real danger. It's a show about found family, where a girl and a magical cat discover that sometimes the most ordinary moments with those you love matter most. Perfect for viewers who want heartfelt character moments alongside supernatural adventure.