Shang Xian Yi in the World of Ke Xue

Duan Muze, a coser who loves Demon Slayer: Kimetsu no Yaiba very much, traveled back in time. The good news is: there is a system, and you can return to the original world by earning enough impression points. Bad news: He traveled through the world wearing the shell of Black Death Mou, one of the top strings. Even worse news, he became the only ghost in the world. Not only that, he had to jump repeatedly between red and black while playing the role of Hei Shimu/Yan Sheng. What made him even more blind was that this seemed to be the fusion world of Demon Slayer and Conan. Duanmuze, who was surrounded by the red and black sides and was stared at by Conan (suspected to be crazy): (⩺_⩹)(⩺_⩹)(⩺_⩹) I really can't do it hahahahahahahahahahahaha! Since he's already going crazy, let's get Gin and blow up the god. But after being undercover for a long time, he discovered that Gin was actually an undercover agent of the KGB... Well, this world is really fantasy