A tiny rabbit from another dimension crashes through your floor at 3 AM and suddenly your bedroom is the least weird place in the story. Doraemon and Nobita tumble into a spaceship adventure that runs on pure setup-and-payoff comedy, the kind where stealing from the fridge matters as much as saving a universe. This is Doraemon at its coziest, a movie that treats impossible things like they're as normal as homework you forgot to do.
Nobita's peaceful sleep shatters when the floor of his room trembles and splits open. Through the gap tumbles Chamii, a small rabbit creature from another dimension, pursued by forces she refuses to explain. Before Nobita can process what's happening, Doraemon catches her raiding the kitchen. Chamii's desperation becomes clear when she reveals a passage beneath Nobita's floor leading to an orbiting spaceship. Inside, she introduces them to an entirely different world: a frontier planet called Koya Koya, where she's searching for her missing brother. The planet teems with untamed wilderness and strange creatures, but also danger. A local boy named Roppuru becomes their guide, and together the group uncovers that Chamii's disappearance connects to a sinister conspiracy threatening the entire planet. What begins as a random intrusion into Nobita's room becomes a sprawling space adventure where friendship and courage matter as much as Doraemon's gadgets. The stakes keep climbing as they realize some problems can't be solved with technology alone.