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;