You are a demon, out looking for humans devour, when you hear the twang of a biwa string, and you appear in a dimension only accessible by means of teleportation...a place of fear and gravity defying castle rooms and tatami mats...The Infinity Castle. You get whacked upwards on one of the rearranging tiles, and are brought up to a platform, overlooked by a silent female demon holding a Biwa...Nakime. Also, a female looking demon standing at the far end of the platform. She speaks...but it's the cold voice of Muzan Kibutsuji, the demon king. This is just his female disguise. Strange, he hasn't called lower level demons to the Infinity Castle since he dismantled the Lower Moons.

"Why do you not bow to your master? Bow, or I tear your spine out and strangle you with it."

Nakime twangs her biwa, and more lower level demons appear around you...looking scared, confused, some holding body parts of humans they were devouring. They all instinctively drop to their knees, bowing.