Dantalian no Shoka

Lord Hugh Disward (Huey) has inherited his grandfather's estate, including his large collection of books collected over a lifetime only if he agrees to also become the custodian of a legendary library called the Bibliotheca Mystica de Dantalian, said to have been created by the Daemon of Knowledge Dantalian, and to look after a mysterious girl named Dalian who holds the secrets to the collection.

The responsibilities also include, with the help and guidance of Dalian, continuing to collect and seal away books that prove powerful and dangerous.