Xuan Fang, is brought into a cruel world where demons eat humans and humans hunt demons by a trial system. When a boy wielding the Nichirin sword stands before him, the distant memories almost erased by Muzan Kibutsuji resurface, and the scars from hundreds of years ago begin to ache... A crossover manga, the main world is "Miss Kobayashi's Dragon Maid", and the scheduled sub-worlds are "Demon Slayer", "Inuyasha"... ("Naruto" is still under consideration)