People who love each other eventually break up because of their differences in status and family background.
"There is a loquat tree in the courtyard. It was planted by my wife the year she died. It is now as tall as a canopy."
The love of the heroine is passionate and straightforward, the love of the hero is unknown, but the object is not the heroine, the sadness of secret love and the pain of not being able to love.