2002年の大地震により分断された日本列島。南日本はアメリカと宗方が、北日本は中国と孫市が牛耳っていた。そして2020年、水没した東京と、火山灰に覆われたままの不毛の大地「グレイ・シティ」。南北どちらにも属さないこの「第3の場所」に、海外で避難民として暮らす日本人を集め、新たなる「日本」を作る…巨大な才能・葛城亮を得て、舷一郎たちの挑戦は始まる!だが、復興のカギとなる稲を何者かに奪われ…!?
The Japanese archipelago was divided by the 2002 earthquake. Southern Japan was dominated by the United States and Munekata, while northern Japan was dominated by China and Magoichi. In 2020, Tokyo is submerged under water and Gray City is a barren land covered in volcanic ash. In this “third place” that does not belong to either North or South, we will gather Japanese people living as refugees overseas and create a new “Japan”… With the help of the huge talent Ryo Katsuragi, Kanoichiro and his friends will take on the challenge. It begins! However, someone stole the rice that is the key to recovery…!?