My Demon Hunting System - Chapter 24: The Demon Guardian

An ordinary student accidentally traveled into an other universe and became the king of a small kingdom. He had gotten a “Cheating Code” of life and was able to complete something extraordinary. This is the story about a king that was able to conquer continents and leave behind him an ultimate legend that will be recited between every generation to come.

- Description from novelupdates

Luke never thought his obsession with novels would lead to his death — let alone reincarnation.After a fatal accident, he awakens in the world of Voidstar Chronicles, a novel he’d just finished reading.But there’s a catch: he’s not the hero. He’s Cassian von Luminaire, the doomed crown prince who dies before the story truly begins.Armed with the knowledge of the future, Cassian was determined to change himself and escape the terrifying fate that awaited him.But the world he’s in isn’t exactly the same as the book he read. Hidden truths and unexpected challenges blur the lines between fiction and reality.Can he outsmart fate and forge a new path, or is he destined to remain an expendable extra?—[Ding! Star System awakened successfully…]

I reincarnated with e*otic game skills, but this is apparently an apocalyptic dark fantasy. I can’t die, so I tried to save the world with e*otic game skills… “Saint! Save us!!” “Saint! Save us!!!” People keep calling me a saint.