Nana Suzuki winds up being split into seven copies of herself. Besides the original Nana, there's also a smart Nana, a happy Nana, an angry Nana, a sensitive Nana, a sad Nana, and a slow Nana.

Under the impression that they saved the World of Den-O, Tsukasa Kadoya (Kamen Rider Decade) and company begin their journey to the World of Kabuto when they are halted by Sieg who presents them a manuscript that detailed the legendary Oni Conquest with Momotaros' image on it. As this occurred, the Tarōs mysteriously vanish from the DenLiner as they are about to help Kotaro Nogami (Kamen Rider New Den‑O) out with the true threat to their world.

Nobita finds a passage to a spaceship in another dimension. With their new friends, he and Doraemon fight the cruel leader of an exploited planet.

Nobita wishes the world into a magic-reliant one with Doraemon's Moshimo-Box, and, along with his friends, must stop an asteroid from hitting the planet with help from a sorcerer-in-training.