I Explore Alone

Duan Xun, a middle-aged homebody, was in a dilapidated rental house when something strange suddenly came to him! I thought everything would be fine if I escaped from the building, but unexpectedly I stepped into the abyss. After a narrow escape, he arrived at the rooftop where the exit was supposed to be. The moment he opened the door, there was only endless darkness and a scarlet portal leading to an unknown place. Everything waiting for him was unknown! My solo exploration is about to begin! ~<Suspense reasoning, survival, system, copy, weird direction, thriller game>