Dantalian no Shoka

 ダンタリアンの書架  Bibliotheca Mystica de Dantalian

Hugh Anthony Disward inherits an old mansion and a personal library from his grandfather. In the basement of the mansion, he meets a mysterious girl—Dalian. She is a Dantalian and a gateway to "Dantalian's bookshelf", which stores the prohibited books of the demons.