Norns Fateful Letters

This is a story about "protection" and "fighting for". If your destiny was already determined, would you still have wishes for the future? The ancient planet Sikoti is covered with magnificent and mysterious ruins, providing shelter for weak humans to avoid climate disasters. Human beings rely on ruins to build cities, but behind them is a group of people with a special destiny, "Yang Yan", who silently devote their lives to maintaining the operation of the ruins. The girl Rowena is the postman in the small town of Nootong. She and Byx, the carrier pigeon that can speak human language, travel to every corner of the town, delivering letters from far away. She never thought that the key to the future destiny of the planet would fall into her hands by accident. On the other side, the government [Ruins City-State] and the anti-government organization [Liuying] are constantly escalating friction in the ruins cities across Sikoti, leading the storm of war to a situation that is difficult to end. One day, Rowena received a commission to deliver a letter to the capital for a mysterious man named Norns. A conspiracy concerning the survival of the planet and mankind begins.