The PV features silhouetted skylines of New York City, New York, Seattle, Washington, and London, England.
The niconico upload is described as "A civilization destroyed by a disaster, a world rapidly becoming a desert. In such a world live two twins; an older brother and a younger sister. The older brother's dream was 'to do something that will shake the world someday'. One day, they met a shabbily dressed old woman. She said that somewhere out there was a 'blue bird' with the power to save the world. The siblings went out on a journey. To search for the 'blue bird'."