Chen Tianmian discovered that the boy he was most familiar with, Liu Yuyu, had traveled from the future. They were both seven years old at this time. "Can you imagine, this kind of thing happened to me. I realized that the thirty years I lived before were probably just a dream I had while napping in primary school class. My entire thirty years of life collapsed inside my seven-year-old body. There are many things that have not had time to happen, and there are many things that can be undone. But there is only one thing I want to change. I want to prevent the birth of my brother. My mother must not give birth to him. Tianmian, do you hear me?"
Concept: Adults are always making up for their childhood selves