Demon Slayer: I'm Lying, You Don't Breathe Water

Step into the Taisho-era world of demons and swordsmen twenty years before the main storyline begins. When Minoru finds himself reincarnated into the Demon Slayer universe with a unique system, he wastes no time preparing for the dark trials ahead. Training under Sakonji Urokodaki and climbing the ranks of the Demon Slayer Corps, Minoru pushes the Water Breathing style to its absolute limits, ultimately becoming the strongest Water Hashira in history. Armed with his system, he unlocks legendary abilities—such as the Transparent World, the Crimson Red Nichirin Blade, and the Slayer Mark—without paying the toll of a shortened lifespan. By evolving his technique to rival the Sun Breathing of the legendary Yoriichi, Minoru sets out on a fateful night to rewrite history, save beloved comrades like Rengoku and the Kocho sisters, and deliver a devastating blow to Muzan Kibutsuji that will echo the terror of the past.