What does it mean to find acacia in your dream and never wake up in your dream?

People who miss him always appear in dreams, and people who see acacia in dreams are willing to stay awake. Find the shadow of lovesickness in the dream and hope to stay awake in the dream. This is what the male host said to his old friend in the TV series of Kyushu Sky City, which clearly expressed the long-standing yearning of the male host for the female host. It probably means that people who miss you will always appear in dreams, and people who see acacia in dreams are willing to stay awake.