Wang Yifan was part of Zuo Shuning's life before she turned eighteen. Later, he became a passerby.
Chen Wenjun was the one who saved Zuo Shuning after she turned eighteen. Later, he became hers.
Chen Wenjun thought Zuo Shuning still liked Wang Yifan, unaware that after turning eighteen, he was the only one in her heart and in her eyes. It wasn't until a rescue accident, when she saved him once again, that he realized he had to fight for the one he loved. What if she could become his girl?