Anime Crossover: Becoming a Sword Saint, Starting with Demon Slayer

A Demon Slayer fanfic with a dark tone and a ruthless protagonist. A shut-in from Tokyo loses his job and falls into despair, only to discover that he is a descendant of Yoriichi Tsugikuni. He has the Demon Slayer Mark, Transparent World, Sun Breathing, and a demon body set at 70% of Kokushibo’s strength. He takes the Mist Hashira as his disciple, saves the Rengoku father and son, and puts an end to the injustices in his heart. He sets things right and makes up for past regrets. The protagonist is half human and half demon, and can use Sun Breathing. If that’s not your thing, don’t read. Furukawa Jo: “What’s 1,500 divided by 3, Muzan?” “What do you mean?” “The three of us will cut you into three pieces. That means 500 strikes per second.” In this life, he will reach the ultimate realm and scale the heights of swordsmanship on his journey to becoming a Sword Saint.