In yesterday's world, where humans used to live peacefully and were protected by laws, only a few are unfortunate enough to face situations involving death or torture. The rest of the humans had forgotten what it meant to survive with strength.Money and other forms of power had taken over the world; however, with the arrival of monsters, humans had to resurface their previous instincts to live through hell. To survive and keep their loved ones alive, humans once again had to fight like their ancestors, whether they had to face, endure or run.Monsters and animals, on the other hand, never forget their instincts, even if they are raised in safe environments. These monsters that appeared may seem like mindless freaks, but none of them are below humans if competing with survival instincts.Therefore, when these monsters realized the humans had skills or other weapons given by the system, they learned through experience and developed abilities to tackle the humans with a hook or crook.A
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