Doraemon: The New Record of Nobita's Spaceblazer

While Nobita is asleep, he suddenly feels the floor shaking as if an earthquake is happening in his room. A small rabbit named Chamii, from another universe, uses a hammer to open a door between dimensions and crawls into Nobita's room through the floor. Nobita wakes up, and Doraemon hears someone stealing food from the fridge in the kitchen. It turns out to be Chamii, who gets caught by Doraemon and Nobita. She shows them the passageway beneath Nobita's floor that leads to a spaceship. Once inside, they discover the Koya Koya Planet and meet a boy named Roppuru.