Zeng Li who has started the treatment to get braces has been terrified that she is getting her braces when she is almost turning 30. Later, Zeng Li meets Ai Jing Chu in the library too. The other day she finds out her dentist has been on a leave and her new dentist is Ai Jing Chu. She gets the braces done and while heading home receives a "do's and don'ts while having braces" tips from Ai Jing Chu.