Demon Retreat from Another World

In 20xx, virtual reality technology entered the fifth stage, and the original immersive VR was upgraded to an emerging technology VS. During the same period, a massively multiplayer online game called "Virtual Surreal Fantasy Online (VSFO)" appeared in front of the world. The game used VS technology combined with artificial intelligence to build a huge alien system, exploring endless operating space and immersive game experience. Players continued to find unprecedented pleasure from it. Once the game was released, it quickly became popular all over the world. But in such a popular online game, an ordinary player discovered something unusual in the game, that is - the player can actually follow an unnamed NPC on a quest line in which he is the protagonist! "This NPC seems quite interesting. Is it an Easter egg? Why don't you follow me and have a look?" With this mentality, the player followed the NPC, and then he discovered the huge conspiracy hidden behind the game settings.