Since I read almost no Japanese, I know next to nothing about Chiaki, except that she's a Japanese pop singer who has a daughter. Mostly I know is that her aesthetic is pretty adorable.
I found this mook in a department store several years ago but didn't buy it at the time. I happened upon it serendipitously last year on Amazon.jp and knew I should get it, especially since I found a cheap used copy (I don't just miss Japan, I miss Amazon Japan!).
I'll share a different Chiaki mook another time. I hope her world is as sweet as it looks.