Mister Pipi, from another reality, is reincarnated into the world of Naruto. He awakens to find himself in the body of a pig, stripped of his former life and thrust into a new and unfamiliar existence. His new life begins not as a powerful ninja, but as a simple farm animal in a world of shinobi.
The pig is soon found by Naruto, who is overjoyed at the prospect of having a companion. He happily adopts the animal, bringing it home to be his pet. From Naruto's perspective, he has simply gained a new friend to look after, unaware of the pig's extraordinary origins or consciousness.
While Naruto cares for his new pet, he has no idea that the pig is actually Mister Pipi, a sentient being from another reality. The central hook of the story revolves around this dramatic irony: Mister Pipi must navigate his new life as Naruto's pet, all while concealing his true intelligence and identity from his clueless but well-meaning owner.