Underwater library. Kaneko Yu.

The underwater library, hidden deeply near the Tokyo Station, stores rare books from different parts of the Earth. It is here that art dealers come from around the world in the hunt for the most valuable specimens, and the young librarian of the crossbar, continuing the family business, carefully defends the library collection.

When the unthinkable happens, someone attacks the head of the library,- The glead is taken to reveal this crime in order to save the book at all costs.