The novel is divided into three parts: the story of the first male and the people around him, the story of the second male and the people around him, and the story of the encounter between the two groups of people. How will they, who were simple and happy as children, face life after experiencing various tests? "If you don't say some things, you really won't have a chance to say them." Everyone smiled: "It's good that you know." "The weather is so nice, let me sing "Insects Flying" for you." Everyone smiled, "Just keep this song in tune." The friendship between friends is a life-long encounter for him...