It is now 2100, I am 50 years old, and I am locked in a closed and narrow space. The simulated small sun on the roof brings warmth and brightness, but I cannot feel the existence of light and warmth. Yes, I am imprisoned in a prison without freedom. As for why I am imprisoned here, I think it is probably because I destroyed the world. Thinking that the days in prison were so boring, I thought about my past experiences and wrote them into my memoirs to pass the long and boring days.