Whose time will you be the protagonist in ten years' time? Maybe no one is. Lin Jin spent ten years working hard just to stand in front of him confidently, so that she could be qualified to enter his world.
Li Shishi is good enough and hardworking enough. In his youth, all he thought about was becoming a better version of himself. For Lin Jin, it was just the last corner of youth.
We end up discovering that we are only the protagonist of our own story, and the people we love have their own stories.