I had a part-time job at a convenience store. I spent a lot of time repeating “Hello, Hi, Goodbye”. Then I suddenly thought. How many meaningful words do we have in our daily lives? Many friends and acquaintances we meet say “ Hi or Let’s hang out next time.” Furthermore, to lovers “I love you, I miss you” etc. I doubt whether it is true or not. As time goes by and becomes adults, the meaningless words become lush and lighter. I expressed the lightness of the language that appears in formal relationships.