Who are you?

This is the story of a writer who, after having great success with his first book, has a disastrous creative block. So much so, that not even the pencils want to write for him.
In her anguish for him, a delivery girl arrives at his door and delivers a mysterious box. After inviting her in for coffee, they share a pleasant conversation about fame and success.
What's in the box?... No one knows what inspiration can be wrapped up in.