I Became the Shadow Hashira in Demon Slayer

Also known as Demon Slayer: My Mark Burns with the Fire of the Red Lotus and Demon Slayer: This Shadow Hashira Is Pretty Strong, But Not That Strong A canon-faithful novel with a cool-headed, righteous protagonist and a passionate, lighthearted tone! Dark Breathing is what other swordsmen call this Breathing Style. I prefer to call it Shadow Breathing. Ryuuichi Tsugikuni, heir to the Tsugikuni name, trained bitterly for three years before joining the Demon Slayer Corps, all to save his younger brother Yuji, who was already trapped in the Infinity Castle. From the extraordinary First Form to the nearly invincible Seventh Form... From the grueling battle of the Final Selection to calmly facing the Upper Ranks... To pursue his younger brother, who had fallen into demonhood, to slay the demon that killed his family, and to put an end to the calamities of the Taisho era, the story of Shadow Hashira Ryuuichi Tsugikuni begins...