Puzzle: the Forgotten of the Doomsday Loop

Chen Xuan, a young man from Zunyi, is trapped in a strange doomsday cycle, crossing desperate situations every night to survive. When he wakes up, he has no memory and only the instincts are engraved in his body. Su Qian, a childhood sweetheart in psychology, has seen through anomalies and secretly spied on by mysterious organizations. In layers of fog, he struggles between forgetfulness and awakening, and discovers that the end of the world is an abandoned timeline of reality, and he is the only hope to break the cycle.