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...
Welcome, everyone!
I'm your expedition commander, Ratty!
!مرحبًا بكم جميعًا، أنا قائد البعثة، جرذ
Willkommen, werte Besucher! Ich bin
euer Expeditionsleiter, Ratterich mein Name.
¡Bienvenidos! Soy Rata, 
el comandante supremo.
Bienvenidos. Soy Rata,
el comandante supremo.
Bienvenue à tous !
Je suis votre commandant, le Rat !
Benvenuti, signore e signori!
Sono il comandante supremo Nezumy
Sejam bem-vindos! Sou o
comandante da expedição, Ratinho!
Ребята, добро пожаловать! 
Я ваш экспедитор, Крысёнок!