Shangri-La
 In the mid-21st century, the international committee decided to forcefully reduce CO2 emission levels to mitigate the global warming crisis. As a result, the economic market was transferred mainly into the trade of carbon. A great earthquake destroys much of Japan, yet the carbon tax placed on the country is not lifted, so Tokyo is turned into the world’s largest "jungle-polis" that absorbs carbon dioxide. Project Atlas is commenced to plan the rebuilding of Tokyo and oversee the government organization, which the Metal Age group opposes due to its oppressive nature. However, Atlas is only built with enough room for 3,500,000 people and most people are not allowed to migrate into the city. The disparity between the elite within Atlas and the refugees living in the jungles outside of its walls set up the background of the story.