This story came from a dream I once had.
In the dream, I found myself back in my schooldays as a child. I was sleeping with my head on my arms, then looked up and saw a man watching me. The sun was shining brightly, and my heart felt so sweet. Even after I woke up, I still felt blissfully happy, so I wrote this story based on the few memories I could hold on to. That scene from the dream also became the story's opening.