The pain of the passing years of youth, the sorrow of lingering memories. On the road of youth, it is inevitable that you will fall in love with several people, either secretly or openly. Looking back now, the only difference is whether I still love or whether I have loved before. Each of us also has our own childhood sweetheart or childhood sweetheart. Gu Yixi and Lin Yifan were not childhood sweethearts, nor did they know each other since childhood, nor were they so-called childhood sweethearts. They were high school classmates, in the next class who were supposed to have nothing in common, but he fell in love with her regardless of everything. There was no so-called bloody encounter between them, it was just a chance encounter, and they were attracted to each other. Their love began on a clean campus, and ultimately meant it was a vigorous love. Many years later, thousands of miles apart, we still love each other deeply and miss each other endlessly. Such pure white love is always missed by people, and they will never be able to escape the city of memories in this life. I only hope that after many years of separation, neither of us will regret it.