After graduating from junior high school, I dreamed of going back to school many times. What is the reason?

Maybe you subconsciously miss the good times of junior high school, have a special affection for the school, and there are people or things in the school that you can't forget. Maybe your life now is not as satisfying as that of junior high school. You want to escape from your present life, so you will see it in your dreams at night.