Travel around the world with the house! What's the story in Travel Notes of Flying Houses?

Travels around the Flying House is a particularly romantic animated film. In the story, grandfather and his wife love each other very much. Later, after his wife died, his wish before his death was to travel. Grandpa tried to tie many balloons above the house, and the strong buoyancy made the house fly in the air. This is an animated film that is especially cured.