Hinako Aoi, a novice librarian who works at a city library, solves difficult and bizarre questions through a "reference service" that helps users find what they are researching and looking for at the library.

A book mystery-solving drama. The serialization period was approximately 10 years, and the work, recommended by the Japan Media Arts Festival Jury Committee were completed in style. 7 volumes of the finest human drama that connects books and people!!