Hundreds of years ago, desire gave rise to the Mana Ecosystem, nearly wiping out humanity. Humanity instantly became prey, civilization was shattered, and suspicion and fear in the apocalypse widened the distance between people. In the face of disaster, people gradually realized that emotions—something once considered taboo by the Lighthouse—are now the strongest bond, breaking through all obstacles and building a community with a shared future. Can the survivors, driven to despair, reclaim their future?