Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
A distant future in which the earth was ruined in the last war. Air pollution reduced the Human Longevity by more than half.
Shudo, a boy living in a slum, meets the mystery fugitive Atalva, who tells him the story of a girl.
The girl who lives for 3000 years with management AI in the giant underground shelter "Neosphere" left by the ancients, holds the power of a certain taboo.
Knowing this, Shudo and Atalva head to the underground Neosphere.