He Youran, a 16-year-old math difficulty student, met Li Yu, a 23-year-old math teacher. After experiencing many things, the two gradually warmed up to each other. On the day after the college entrance examination, Li Yu responded to He Youran's confession, but He Youran, who suffered from acute otitis media, did not hear it. The next day, He Youran received a letter from five years ago. He finally knew what Li Yu had said but he had not heard it, and decided to go back to find Li Yu. What should He Youran do after seeing Li Yu?
Concept: Love is regardless of age or gender. All we can do is not regret it