El novio del Santo de la Espada es el Rey Demonio [español/spanish]

(Contains sensitive and explicit content in some parts) Namgung Yeojin, ranked as the best swordsman in all of Murim, dies after a brutal fight at the hands of his childhood friend, who had become a user of demonic arts due to a ki deviation, after disappearing for eight years following the fall of the Namgung clan. Upon dying, he sees his life as a novel and how his childhood friend died at the hands of a hero called the Sword Saint, because it seems his childhood friend, Wi Okhyeong, is the Demon King. Now that he has a second chance, having been reborn as a six-year-old and knowing the truth about the world, he is determined to change his destiny and that of his childhood friend, making things better for everyone. (Cover by IA. I will redraw it over time.) Updates: Random (possibly on weekends)