There are two reasons why the heroine is called Xiao Hui.
One is that her English name is Cindy, short for Cinderella.
The second is that she has never grown up. She has the sadness of a girl, an evasive character, and is not a very mature and firm personality.
This story is not love, it is just a fairy tale, like a hazy veil, through which we can see life, youth and campus.