18-Year-old Shen Yanxi met transfer student Fu Yushen by chance in the high school library. The two bonded over their mutual favorite books and began a green campus romance.
The two prepared for the college entrance examination together, studying in the library, watching the stars on the playground, and holding an umbrella together on rainy days. Fu Yushen always silently protected the introverted Shen Yanxi.
On the eve of the college entrance examination, Fu Yushen suddenly disappeared, leaving only a brief letter saying that he had to leave because of something at home. Shen Yanxi's world collapsed instantly, but she was nowhere to find the answer.
? The reunion happened five years later. 23-Year-old Shen Yanxi became the editor of a publishing house. She unexpectedly met Fu Yushen, who had become a best-selling author, at an author signing event. Both of them were shocked by this reunion.
It turned out that Cheng Yuan explained that his father suffered a cerebral hemorrhage and he had to give up his studies and love and go home to take care of his father. He had wanted to contact her all these years but did not dare to disturb her life.
Concept: Looking at the unsent letters, the two of them often wonder, if they had been sent, would there have been a different ending?