Set Your Heart Ablaze (S02E07)

After Tanjiro and Rengoku's victory over Enmu, they are confronted by Akaza, the formidable Upper Three demon. As Tanjiro lies injured on the ground, he faces a near-fatal strike from Akaza, only to be saved in the nick of time by Rengoku's swift intervention. A fierce clash ensues between Rengoku and Akaza, during which Akaza tempts Rengoku to join him as a demon. Rengoku firmly rejects the proposition, but his battered body struggles under the weight of exhaustion, pushing him beyond his limits.