Upper Rank Zero: The Demon Who Conquered Muzan's Heart

Bai Yunfei awakens in the Demon Slayer world face-to-face with the Demon Queen herself—Muzan Kibutsuji. But instead of cowering, he flips the script: why be her servant when he can make her obsess over him? Granted the unprecedented rank of Upper Rank Zero, he breaks every demon rule—drinking demon blood instead of human, collecting a harem of powerful demonesses, and even daring to sink his teeth into Muzan herself. Yet his ambitions don't stop at the demon hierarchy. With the Hashira system not yet established, he'll become the first Golden Hashira, mastering all 36 breathing styles while ju…