Called Sweet Dream

(This article is written by the general public without a protagonist. Because there is no protagonist, the perspective can be switched at will, and multiple lines can be opened at one time. If you mind, please don't embarrass yourself.) Round One: "In order to investigate the real cause of the destruction of the previous civilization, humans formed an investigation team called 'Wuaimu'. As the investigation deepened step by step, the truth gradually emerged. It turned out that the previous civilization was not destroyed by war at all, but by a little girl named 'He Nainai'. In order to prevent the current civilization from repeating the mistakes of the destruction of the previous civilization, 'Wuaimu' began to explore ways to eliminate He Nainai. Certain 'things' left over from the previous civilization 'happened' to provide relevant clues." ——Former Civilization Investigation Team