Xi: means sunshine, generally referring to the morning sun.
At first it sounds like a warm name
If she had been born two minutes later, she would have been born in time for Christmas
On days other than school days, I like to wear a hat when I go out;
The number of times you talk throughout the day can be counted on one or two hands;
It's good to be low-key, but occasionally you have to be high-key;
Provocation is okay, if you don't mind ignoring it;
You can also sleep peacefully...
I don't know who influenced who first, but both siblings have this habit of two or three.
... So, these two guys are indeed two siblings,
The plot progresses slowly, you can start directly from Chapter 3.