On an ordinary weekday night, I walked out of the office building in the CBD, exhausted. Looking back, I saw bright or dim lights coming from the densely packed windows, like a bee's nest. I think of the people coming and going in this building, like tireless worker bees, repeating a fixed route, busy, busy, busy. An idea suddenly appeared in my mind, and this novel came into being. I hope to use the shell of science fiction to tell realistic stories, explore hope, and celebrate freedom.