For the Sake of His Partner, Even This Villain Can Change Roles

'''First World (Completed): In a future world where biological mutations run rampant, Yu Yan transmigrates into a researcher at a biological laboratory. His subject of study is a genetically mutated experimental specimen, carrying various dangerous viruses, and is also the antagonist of this world. In the original plot, he is a psychologically twisted and malicious cannon fodder who continuously tortures this experimental specimen, so when the specimen escapes, it casually kills him. Yu Yan, a lazy office worker, always ready to slack off. Second World (Completed): Yu Shi, a man as honest as his name suggests, loves crafting and doing household chores. Transmigrating into a strange wo...