I Was Just Going to Stream from a Mountain, So How Did I End Up in the Primordial World?

Before Dad left, he told me to guard the back mountain, saying there was a huge secret hidden up there. Yeah, right! I didn't believe a word of it! I needed money for food, so I started a livestream instead. Then... “Guys, I just found a little white cat. What should I feed it?”, Dragon Shield Bureau: “Put it down! That's the cub of the apocalyptic divine beast, the White Tiger!” “Chat, this rock can talk. What do I do? Waiting for answers, kind of urgent!”, Chinese Academy of Sciences: “That's the divine beast Black Tortoise, who's lived for a hundred thousand years! Please, hand it over to the state!” Later, the apocalypse arrives and the world falls into chaos. The bigwigs from every faction beg me to open the back mountain. Lin Ye takes a drag on his cigarette and says helplessly, “I really just wanted to be a small-time streamer. How did I end up becoming humanity's savior?”