One is the sun, one is the moon, and one is the tides.
The sun and the moon chase each other but cannot catch up with each other. Why can't the tide look back at the moon after waiting so hard?
If the moon stops and throws its brilliance into the tide, can it end the eternal fate of these three people?
The female protagonist has traveled through time, the male protagonist is Leng Shuangzi, and the female protagonist has never watched Romance of Three Swords.