In a certain place, there was a yokai known as Takuroubi. As anything it touched burned, it lived avoiding humans and even yokai. Ratman approaches Takuroubi and proposes that he work for humanity`s sake, taking advantage of the deep loneliness that Takuroubi feels. Thus, Ratman`s attraction, BiBiBi Fire, becomes a big hit. Takuroubi was ordered to never leave his room at night, but one evening, unable to stand the boredom, he goes out. He meets a mysterious robot, Pig. Takuroubi and Pig hit it off immediately, and their friendship quickly deepens, but...