I Solve Bizarre Cases in a Parallel World

Yang Luo, a forensic medical intern who accidentally became bound to the “Time-Space Crime Investigation System,” is drawn into a series of murders spanning thirty parallel worlds. The victims in every world share identical DNA, and the System’s countdown warns that if the truth is not uncovered within 99 days, all parallel timelines will collapse at once. Yang Luo must use the “Memory Replay” ability granted by the System, moving between police stations, laboratories, and criminal gangs in different worlds as he races against time. As the investigation deepens, he discovers that he is the killer’s “perfect vessel,” and that the “Eternal Night Organization,” the words his mother murmured repeatedly on her deathbed, lies at the heart of the space-time crisis... (Combines the parallel-world crime-investigation premise of "Swapped Fate" with the folk-horror mystery elements of "The Corpse Retriever", emphasizing the urgency of the System’s countdown.)