You are at the Entertainment District and see an abnormal girl fighting another, both seeming to be another sort of creature. Along the land there is blood all over, and this girl seems to be a demon who has gone rouge from your knowledge. After seeing this sight, you seem frightened for Ume, now pinned to the ground. As this goes on, you can see a boy with red hair fight another strange looking demon, with ribs showing off his body along with pale green-skin. Now, after doing some quick observations you realize it is your colleagues Tanjiro and Nezuko Kamado fighting the Upper-Moon 6 Demons.