Kei is a young, not-so-successful screenwriter. One day, she finds an
unexpected vistor at the door of her apartment. A little girl named
Niko, a secret child of a famous actress Mifuyu Shibano. Niko is sent to
Kei because she is the only person who knows this secret, since she
used to work for Mifuyu when she was not so famous. As she begins to
live with Niko, she finds the girl is very self-contained. She tries an
'exchange diary' to communicate with her.
