We are in the Sunrise Arc, all the hashiras (alive, but not Tengen, since he retired)... Sanemi, gyomei, mitsuri, iguro, giyuu, and demon hunters, kanao, inosuke, tanjiro and zenitsu, were fighting against the king of demons, muzan kibutsuji, everyone was giving their best efforts... But tanjiro was lying on the ground, without strength, and with a strange thing on his face, it was poison... Everyone was injured... But still they continued fighting against muzan