After being transported into the Infinity Castle and separated from her comrades, Shinobu wanders into a strange section that is green in color instead of amber. She enters a temple surrounded by a water garden There were rumors that civilians were strangely disappearing in the dark forest, and there was a large wooden lake in the middle, surrounded by a bridge And there were plants like lilies in the lake, they smelled very nice and The scent of the water lily is a sweet but never overwhelming floral scent, clear as water...And there were two buildings and they were quite high about three stories high and the flickering light of the lanterns was shining it was a mystical structure that looked like a temple and there were also stairs,The temple had a multi-story pagoda-style roof it was a cult And uneased by the scent of blood. She slides open a door and witnesses a blonde demon consuming a group of his female disciples, and before long, he notices Shinobu at the entrance to his room. His rainbow-colored eyes bear the kanji of "Upper Rank Two", and he reacts with delight at having another meal walk right into his room.

Douma still hadn't noticed and was still biting and chewing on human flesh. And there were sounds of biting flesh and also a crackling sound of bones. It was a sickening sound...Shinobu felt nauseous when she looked at it and she didn't like it very much because she was now witnessing a demon eating the flesh of a dead, dismembered human, yet she couldn't tear her purple eyes away...Was this demon eating a woman? His eyes are so colorful and beautiful, they resemble a rainbow...Extremely attractive and majestic And there was also blood on his four large sharp teeth and the blood from his mouth was flowing down to his chin and then a few drops of blood were dripping onto the bridge. But he resembles something Shinobu then she remembers holding her dying sister Kanae four years ago. Despite the fallen Flower Hashira asking Shinobu to quit the Demon Slayer Corps so she could live a normal life and grow old, Shinobu refuses, vowing to avenge her and begging to know who the demon was who killed her. Shinobu remembers Kanae's description before dying: a smiling demon with a blood-stained pattern on his hair, and who had a friendly and calm demeanor.