Yan Jia is the only blue whale in this ocean. It thought it would be alone forever until he appeared.
When Yan Jia got used to that person's presence, he disappeared, as if he had never appeared before.
He is probably dead, Yan Jia thought.
…
Later, Yan Jia finally saw the sky and the sun that he had longed for, and when he saw him, they finally died.
Purpose: Self-salvation