Demon Slayer: Reborn as the Flame Hashira, I Slay Demons to Extend My Life

[Demon Slayer, no female lead, original plot adaptation, invincible protagonist] Qi Ze transmigrates to the world of Demon Slayer and is reborn in the body of the deceased Kyojuro Rengoku, with a formidable physique and Flame Breathing that scorches the mind. However, his body is extremely unstable after being reborn. To keep himself alive, he must hunt demons and obtain Muzan’s blood. The same blood entering his body will also turn Kyojuro Rengoku into a demon, while empowering his sword techniques with Blood Demon Arts. After Qi Ze fuses with the Muzan blood inside the Twelve Kizuki, another Demon King is born. Muzan Kibutsuji is stunned. “There’s another Muzan in this world?” “But... he’s reached the perfect state and can withstand sunlight...”