Chii-chan to Obake Toshokan

Third grader Chizuru lives alone with her self-centered mother, and she's always lonely. Everyone just calls her Chi-chan and she spends her lonesome days in the library. One day at an old library scheduled for demolition, she meets a curious family of "little people". And together with her classmate Shuu, the only other person who can see them, she peeks into their curious world...