Leave it to me

In the early hours of the morning, Dario and Li Mengjie were walking together on Jiangbin Road. Li Mengjie lived two kilometers ahead.
Dario was in a trance at this time, as if he had returned to his childhood, and scenes from the past flashed before his eyes like movie scenes.
Li Mengjie has not yet come to her senses. Is this handsome man next to her still her weak, dark and thin classmate and brother?
It seems that Li and Dario have undergone tremendous changes in the past ten years....