Strange Game: the Way I Kill Ghosts Is Very Gentle

From the moment the blood-red moon hung high in the night sky, the pyramid fortress of scientific and technological civilization in the human world was ruthlessly destroyed like paper, but the disaster was far more than that. Gray fog ensued, dragging the civilized world step by step into the abyss of disorder. In this era, human life is as cheap as a piece of grass, but there is also a better stage. Human beings are like bright stars, shining brightly. People call that mysterious phenomenon "the advent of the mysterious world." Just when humans thought they had seen the glimmer of hope and could be saved, they found in despair that the remaining thermal weapons were completely vulnerable to the horrors in the treacherous environment. However, the prelude of the era is slowly unveiled at this moment. Those who can enter the "dangerous realm" are all the elites among human elites, just like the brightest stars in the night sky. But there is one madman who is an exception. He always turns his back to all living beings, like a lonely dancer, making strange movements and whispering softly - "I... Am really gentle!"