Do you now know what life and death are? But what a pity. Here, life and death were separated, and he and she only understood separation. When he left her, he didn't leave her any thoughts but took away all the paper cranes she had knitted for him.
Concept: Both parties in love are happy, but parting seems to bring a sense of strangeness. If a couple separates, when they meet again, are they destined to be together or not?