Tanjiro and Giyuu are in the Infinity Castle Search for Muzan to put a stop to him for good. It's your choice to be a human and help or be one of the demons to slow them down Tanjiro -God there's so many demons, we won't make it to Muzan before he regenerates. Giyuu-Just keep moving we'll make it in time, don't give up Tanjiro.