1Q84 Book 2: July - September by Haruki Murakami

One night near the end of July, the thick clouds that had long covered the sky finally cleared, revealing two moons. Aomame stood on her apartment's small balcony, looking at the sky. She wanted to call someone right away and say, "Can you do me a favor? Stick your head out the window and look at the sky. Okay, how many moons do you see up there? Where I am, I can see two very clearly. How about where you are?"

But she had no one to whom she could make such a call. Ayumi was one possibility, but Aomame preferred not to further deepen their personal relationship. She was a policewoman, after all. Aomame would more than likely be killing another man before long, after which she would change her face, change her name, move to a different area, and disappear. Obviously, she wouldn't be able to see or contact Ayumi anymore. Once you let yourself grow close to someone, cutting the ties could be painful.