Lord of Mysteries + Detective Conan + certain characters from other anime

The male protagonist has no romantic partner.

Lin Xiuming is just an identity; in reality, he is Morofushi Hiromitsu, who survived death but lost his memory, and went from being Shinichi Kudo's neighbor to becoming Conan's right-hand man.

Order of appearance of important Conan characters:

Date Wataru (Weapon Master), Chapter 4; Kudo Shinichi (Reader, Deduction Student), Chapter 5; Mouri Ran (Lucky Guy) and Suzuki Sonoko (Praiser), Chapter 11; Professor Agasa (Craftsman), Chapter 20; Amuro Tooru (Nightmare), Chapter 28;

Many years later, facing the gray fog and light gate, Klein or Zhou Mingrui would always think of the night when they were tied up with ropes... "Someone, feed Master Ke the medicine!" Mystery: Ancient Gods is actually my own second edition. Due to various practical reasons, both the plot and the ideas were messed up. Looking back at what I wrote before, I was not satisfied with many parts, so I simply restarted it. In terms of the plot, this book and the previous one are almost two different stories.