Luo Xun has always been solo because of family reasons. It's not that she doesn't want to fall in love, but because it's really hard to be tempted. She is ready to be single for the rest of her life.
Gu Xing is a standard engineering man. In the eyes of everyone, he is a robot who only likes to read books and do experiments. No one believes that he can fall in love and get married.
The two people had no intention of falling in love. Although they were high school classmates, they had never interacted with each other. It was not until they met again after work that Luo Xun had the idea of falling in love for the first time. She simply liked him and wanted to be with him. She probably didn't expect that she could meet someone who could spend her whole life in one meeting.
Purpose: One cannot always live alone in life