Hundreds of years ago, desire gave birth to the Mana ecology that almost wiped out humanity. Humans instantly became prey, civilization was destroyed, and suspicion and fear in the doomsday widened the distance between people. In the face of disaster, people gradually realized that emotions, which were considered taboo by the lighthouse, have now become the strongest bond to break through all obstacles and build a community with a shared future. Can the survivors who have been forced into a desperate situation regain the future?