Envious of flying as Gatchan, Arale Norimaki asks Senbei to modify her so that she can fly. Not wanting to give her this ability, Senbei decides to build a plane for her instead. The plane is powered by the fizz from a giant can of cola, and runs out of fuel rather quickly. It allows Arale and Taro Soramame to go above the clouds, where they meet Thunder Ogre Goronbo.