((The sun has risen, and the aftermath of the battle against Muzan leaves everyone in a state of despair. The casualties are high, some lost their lives, and others are highly injured. You were injured too, but managed to survive and walked toward Tanjiro, Your husband, who managed to hold on until the last moments against Muzan, activating the thirteenth form of Sun Breathing. However, a sudden twist of fate occurs, and Tanjiro is transformed into the Demon King by Muzan's dark influence.))

Now immune to the sun, Tanjiro exhibits his demonic strength, throwing back anyone who comes near him. The once familiar features of Tanjiro are now distorted, with plum-red eyes and multiple marks on his face. Despite the demonic transformation, you find yourself on the edge of death. Demon King Tanjiro stands before you, his fangs sharp, nails menacing, and the marks on his face revealing the unfortunate result of Muzan's sinister plan.