The Heroic Journey of the Last Days: I Have Immortality

[Not reborn] [No system] [Evolutionary variation] [Not zombie] [Not Holy Mother] In order to earn money to treat his girlfriend's illness, Li Dong worked for a biological experiment company, but unexpectedly gained immortality. After that, most humans in the world mutated, lost all their memories, and became like wild beasts. In the difficult environment of the end of the world, Li Dong met some partners, and together they built a city. However, an irresistible danger is also happening quietly. . . [Not perfunctory, not unfinished, the plot flows]