What does Convenience Store Woman have to say about the roles of men and women in society?

After Keiko decides to quit her job, she hears a “long-forgotten silence that sounded like music” before it is replaced by floorboards creaking under Shiraha’s steps (97). Why is the silence musical to her, and what does its interruption imply?

What about the convenience store originally draws Keiko to it? Does this lure change as the book progresses? What draws her back to the store at the end of the book? What does this lure say about Keiko?