Stars are not eternal, they will fall, and so will love.
During these seven years, Gu Qian squandered Yan Chao's love for him wantonly. When it was all squandered, Yan Chao's heart slowly died, dying of powerless love.
In fact, Yan Chao's heart died long ago, died in a humid childhood, died in the paranoia of his family...
Gu Qian didn't know, he only knew that Yan Chao didn't love him anymore.
Concept: Love is not eternal