It is based on the novel series that originated anime television series Kyokai Senjo no Horizon directed by Manabu Ono in the animation studio Sunrise. The opening theme song for the first season is "TERMINATED" by Minori Chihara. The first ending theme used is "Pieces -Side Ariadust-" by AiRI and the second ending theme used is "Stardust Melodia -Side Horizon-" by Ceui.
In the distant future, the entire planet Earth except Japan, will become a land barren and uninhabitable, the planet will begin to ascend up to heaven with its high technology. Nevertheless, living conditions, on high, are too hard, which makes humans have no choice but to return to a land turned into a death trap. When the planet return to land, many are installed in Japan, the only piece of the globe still living, while the rest, settles around in tiny bits of habitable land.
