Ahem, cough, cough, this is a love story (nonsense)
Ning Qing has known Gu Yuan and Lu Jun for many years.
Ning Qing kept chasing Lu Jun until she found out that he loved someone else and left sadly.
Gu Yuan has been chasing Ning Qing. He thought it was dependence, but in the end he realized that it was love.
Lu Jun had been chasing others, but when he looked back, he realized that the person he wanted was always behind him.