When Gu Shen loved Su Wan, Su Wan was learning not to love him.
When Su Wan didn't love Gu Shen, Gu Shen started to love her.
There is always a three-year time difference between them.
This is the story of a man who spent six years learning to say "I need you" and a woman who spent six years learning to say "I don't need you".
