A psychic ninja fantasy suggesting that the assassins did not die out during the Sengoku era but burrowed under Japan, where they fought a new war against the alien occupants of a crashed spaceship that has lain undisturbed for several millennia.

The Mizuchi bloodline has long been hunted by Yokai, or monsters. Toru and Noboru Takagami are descendents of this bloodline, and under their grandmother's discretion, are given a secret weapon to combat these monsters. It is Tenko Kugen, a fox deity who can take the shape of a man or woman at will. The mischievous deity is accompanied by a shrine maiden, Ko, who will both live with the Takagami brothers at their house. Life just got complicated.

This episode is set in the future where the main characters from Doraemon are all grown up and have kids. Minidora (mini doraemon) accidently gets delivered to the Nobita's future house. The sons of Jyaiyan, Suneo and Nobita plays with Minidora with the special goods he brings out of his pocket. But trouble happens when they ran away from Dorami, who came to retrieve Minidora.