
They need Nichirin Blades to kill an Oni. Suzuki Makoto only needed a kitchen knife. After defeating the Sukuna Oni, a colossal demon from his own world, the swordsman Suzuki Makoto is abruptly swallowed by a vortex and thrown into a Japan he doesn't recognize. Disarmed of his legendary blade, he finds himself in a world haunted by nocturnal creatures that regenerate from mortal wounds. They think they are immortal. Makoto disagrees. When his first encounter with an Oni ends with the demon being sliced to pieces until dawn, a primal terror echoes through the blood connection. For the first time in centuries, Muzan Kibutsuji feels a fear he thought was forgotten. A warrior from another world is on the loose. He doesn't use "Breathing Styles" and doesn't know what the Demon Slayer Corps is. Even so, he slaughters one of the Twelve Kizuki with a common hatchet and copies a Hashira's techniques after seeing them only once. To the Demon Slayer Corps, he is an anomaly. To Muzan, he is a nightmare. In a world where humanity struggles to survive, what happens when an even greater predator enters the battlefield?