The bloodless boy Komajiichiro was torn to pieces by demons, trampled by the geniuses of the Demon Slayer Corps, and sentenced to death by Dr. Butterfly House. He was trapped in the mud like a wild dog. On the verge of death, his consciousness fell into the bloody scorched earth, and he faced the remnant soul of Anjurou from the purgatory and the broken Nichirin Sword of Enichi Tsukuni. The extreme humiliation ignited an undying obsession. He held the burning handle of the knife with his bare hands, and activated Yuanyi's residual power to use [Breath of the Sun: The Setting Sun to Reverse Life] to burn his longevity and defy the heavens to continue his life.
The fingertips melted stone, the flame burned the enemy, and the dying boy showed his sharpness. However, the Hashira meeting three days later lurked murderous intentions, and the threats from the Komaji family, the suspicion of the Demon Slayer Squad, and the warnings of the residual spirits followed closely. Carrying the forbidden inheritance, he must ignite the fire of the sun in a desperate situation, break the shackles of blood, and prove to the entire Demon Slayer Squad: Weeds can also start a prairie fire, and waste wood can withstand the scorching sun!