"Did you know? There is a bird that keeps flying because it has no legs and can't stop flying all its life!"
"But, isn't that very tiring?" She held the two almost identical silver-white necklaces in her hands and lowered her head, tears streaming down her face. She brought one of them to him and the other one herself, and said with a smile, "Then let's be that kind of bird together! Even if we can't stop, we will be together for the rest of our lives..."
"..." His expression was a little sad, with an invisible sadness, "I promise, I will come back in ten years!"
She raised her head to look at him, and then smiled, "Then, let's go see the sea together, see the sea for the first time."
"Okay."
"Then how do I know who is you?" Ten years should be enough to change everything beyond recognition, right?
"We have to carry it with us all the time," he said, holding the bird necklace without legs. "Let's use it to identify each other."
"..."
"..."