Novelist Running Through Time - Chapter 109

(A/N: If a ruthless MC is not your cup of tea, don't read this.)Heat Wave, Torrential Rain, Severe Cold, Tsunami, Flood, and Alien Beasts swept the world in a series of natural disasters, almost wiping out mankind.Lu Nanzhi regressed two years to the past and found out that the settings of the natural disasters was similar to the mobile game app she played before regression.And it was in the beta testing phase.Ding—[Beta Game Test is over.][Data is being reset.][Player is starting over.][Please claim the Beta Test Rewards.]Equip with the Beta Test Rewards, Lu Nanzhi was determine to survive in this life and started stockpiling like crazy!

A 13-year-old deaf teenager living in the 21st century suddenly found himself as a young boy in Japan during the early 1900s. With two World Wars, two nuclear bombs, Hitler and many other disasters awaiting his future, he thought things couldn't get worse.Except it did.He found out later on that he had actually reincarnated into the world of Demon Slayer where man-eating demons ruled the night. He thought things couldn't get worse.Except it did.But hey! At least he had unparalleled talent, incredibly special eyes and future knowledge.How will the story of Demon Slayer change with the addition of this unique character? Will so many still die if the Hashiras had one more pillar in the final battle?Or will the story end on a much happier note?

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

The main character is reborn as a character from a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together. A man named Kururi Helan.