We studied together since 1st grade, the first year of our little elementary school. That time I fell and he helped me up, I felt my heart beat very fast, out of rhythm. Then he started to take classes. Coincidentally, he and I were in the same class, sitting next to each other. So we gradually grew up in joy with our tablemates. And that day, the closing day of the sixth grade, we hugged each other and cried in the separation of joy and sorrow. He gave me a bouquet of flowers, a cute little tiger keychain and a piece of paper. I hesitated to open the paper and read his neat lines, he wrote all the emotions in his heart. I was going to raise my head to thank you but.. when did you leave? And that was the last time I saw him.