Conan and I start the hell-level main line

[Conan fan fiction, no CP, no official pairing, no system, watered-down wine, red and black sides jumping back and forth, black side epic enhancement, with a large number of original red and black characters] Natsume Xing, who "lucky" became the 10000th customer of the time traveler service platform who traveled through a car accident, came to the science world where he had regrets in his childhood, and performed the task given by the time traveler service platform: to replace 73 old thieves to finish Conan. But because there are too many orders from time travelers recently, the system is a bit in short supply, so our Natsume Xing was "lucky" not to get the system. . . What the hell! Why don't I have a system as a time traveler these days! If I were in science...