Doraemon: Nobita in the Wan-Nyan Spacetime Odyssey

Nobita is sure he and Doraemon (Nobuyo Oyama) did a kind thing when they sent stray cats and dogs back 300 million years, until he finds a society of cat-people and dog-people living in a city that matches his own time. Tsutomu Shibayama sends Nobita (Noriko Ohara) into that world as an asteroid heads for the city and the two peoples regard each other with suspicion. The story is about whether neighbors who fear each other can find a reason to stand together.