Iero, a paradise born of suffering and strife. Here, the impossible becomes reality and people live their day-to-day lives free from the horrors of the old world.

Asta is one of many benefactors of Iero-an astronomy student at the most prestigious university in the city, and a member of the Vista Club, a place where old-world tech is studied.

Yet, one day after her brother disappears, she is forced to tackle the mysteries behind the founding of such a paradise, and learn the secrets that allow such a place to still exist despite all odds!