In a whimsical fantasy realm, a comedic tale unfolds as the dark ruler of 'Don Kurai,' Dark, schemes to conquer the human world. Legends speak of three sacred treasures and a destined hero within Don Kurai's lore. Dark seizes one of the treasures, a copper bell, while the remaining two treasures – a golden spear and a silver shield – are mysteriously sent to the human realm. Shinnosuke unwittingly stumbles into Dark's machinations, inadvertently opening a gateway between the human world and Don Kurai. Unexpectedly chosen by the golden spear, Shinnosuke emerges as the hero fated to thwart Dark's ambitions. Empowered by Mata Tami, a girl from Don Kurai, the Nohara Family undergoes fantastical transformations, engaging in a whimsical battle against Dark's forces.