The Tree Sways Gently in the Wind

I conceived this story a long time ago, and it was only recently that I had the time to write it out. In terms of size, it can be considered a novella at best. Its story is set in an elementary school, but this does not hinder its expression. I admit that most primary school students will not have such a high level of thinking, and it is unlikely that normal people will speak like this. Please bear with me. There is not much life and death in this story, but only separations again and again. But at least I believe that it is touching; I am confident that it can evoke many memories of your past and touch the softest part deep in your heart.