Got Hit by a Truck at the Beginning

Half an hour in real time and a whole month in dream time. When Lin Bubai took the initiative to face the truck from another dimension and "escaped" back to reality from that all-gray, dead town, he thought he had just had an all-too-real nightmare. But the sharp stabbing pain coming from the depths of his brain told him that this was no ordinary lucid dream. The dreams in the past were dominated by him, they were colorful, and he could wake up at any time. But this time, he was like an abandoned prisoner, struggling to survive in a gray world, and finally managed to escape through "physical ascension". What is that gray world? Lin Bubai held his head in severe pain and looked at himself haggard in the mirror, but the corners of his mouth curved into a crazy arc.