Dust Wall

When Chen Xuan woke up, the world had changed beyond recognition. The air is filled with deadly particles called "foreign filth", and humans can only survive within high walls. In order to support his adopted sister Tang Shu, Chen Xuan joined an exploration team heading to the wasteland ruins and worked as a lowest-level porter. On the edge of life and death, Chen Xuan's memory fragments began to revive. He dreamed of the forced fusion of the two worlds, dreamed of a girl with silver hair and red eyes whispering in his ear, and learned that the feat that saved the world was tampered with by later generations as the "original sin" that destroyed the world. When the dignitaries inside the high wall toasted to peace, the "sinners" outside the wall had already grasped the blood-stained knife. "If the guardian needs to bear the crime, then this time, I still choose to become your nightmare."