A cat falls into a kid's life and turns out to be something impossible, but the movie doesn't care about spectacle or saving the world properly, it just wants to sit with the warmth of that accident. Ultra-Nyan's powers exist to solve problems the way a good friend does: with gentleness and a sense of play, not heroics. This is a movie built for the specific kind of tired where you need something that feels like being handed a blanket by someone who gets it, wrapped in a joke about space cats stopping the actual worst people.
When Haruka discovers a stray cat sheltering in a forgotten warehouse, she takes him in without suspicion. She calls him Nyan, unaware that her new companion is actually an alien visitor from the cosmos with supernatural abilities. As Haruka settles into her life with the mysterious feline, a pair of ruthless catnappers begin terrorizing the neighborhood, stealing pets for profit and leaving a trail of devastated owners. Nyan's true nature emerges when the gang targets Haruka's circle of friends and their animals. Armed with otherworldly powers, the cosmic cat springs into action to protect those Haruka cares about, turning their fight against the criminals into an unexpected adventure. What starts as a simple act of kindness transforms into something far bigger as Haruka realizes her furry friend is far more than he seems. This film blends lighthearted comedy with genuine stakes, offering fun for viewers who appreciate stories where unlikely heroes save the day through kindness and hidden strength. The bond between girl and extraterrestrial pet anchors the chaos with genuine warmth beneath all the comedic chaos.