Starting from the Reincarnation of Death, I Am in the Foggy City, Killing Strange Things

"Professor, if a person cannot die no matter what, do you think he is lucky or unlucky?" "Immortality? Is there such a good thing?" "Then if we add a premise that in one minute he will die from a silver bullet fired by a large-caliber revolver, and then he will return to three minutes ago with unforgettable pain and despair, what do you think?" "That means he is too stupid. He knew he would die, but he didn't know how to run away?" "But he can't run away..." At the end of the desperate reincarnation, what Ino finally heard was the call of an angel or the whisper of an ancient god? This is a slightly insane story that takes place under a strange red mist city.