孤星之潮

Climate deterioration, famine, war, plague ... It came to the 31st century during these endless cycles of misery.
In 3050, despair shrouded all over the world. Since then, walls had been built and separated people into two parts — fortunate ones inside and unfortunate ones outside.
On the one hand, peace is just an illusion. On the other hand, knell is for the real.

20 years later, in the year of 3070, the scarred planet was declared that there were only 30 years for living. It also meant that ... the countdown to humanity's existence was in its last 30 years.