Wait for me to grow up, okay?

I'm not sure which novel you're referring to, but usually the plot and characters of a novel will change over time. Therefore, sometimes the novel might wait for the reader to grow up so that it could better show the plot and characters in the future. However, the plot and characters of a novel are usually constructed by the author's imagination. They can change the plot and the development of the characters according to their own ideas. Therefore, whether the novel waited for the readers to grow up depended on the author's imagination and creativity.