My Soul Has Penetrated the Murderer's Body, Leaving Clues Everywhere

He is an ordinary delivery boy. In a car accident, he accidentally got a game system. The system told him that the game had begun and there was no turning back. While he was fighting wits with the murderer, he was pretending to be a guinea pig in front of the police. He left clues along the way and escaped. In the final judgment, will he be a savior or a man-loving demon? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.