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...
That's why when Rat Man said
he'd be my first friend, I was so happy.
لهذا كنت سعيدًا جدًّا عندما
.قال الرجل الجرذ أنّه سيكون صديقي الأول
Deshalb war ich so glücklich, als Nezumi-Otoko
sagte, er würde mein erster Freund werden.
Por eso me alegré cuando el Hombre Rata
dijo que sería mi primer amigo.
Por eso me alegré cuando el Hombre Rata
dijo que sería mi primer amigo.
J’étais très heureux quand Ratichon
a dit qu’il serait mon premier ami.
Per questo, quando Nezumi Otoko ha detto 
che sarebbe diventato il mio primo amico
Por isso, quando o Homem Rato disse que
seria meu primeiro amigo, eu fiquei feliz.
Вот почему, когда человек-крыса 
согласился дружить, я обрадовался.