The BOOK OF HOUR event takes place in a library beset by the occult and the paranormal. In a melancholy role-playing adventure, there are no fights, but the main character will escape from dangers and solve puzzles. Before the catastrophe happened inside the library, this place was a fortress of knowledge. A fire destroyed much of the collection, and the librarian died trying to protect the precious books. Thanks to unique talents, the protagonist is able to restore the collection and put it on the former shelves. Occult books can be collected by purchasing them, solving puzzles, or using unusual abilities. By studying the contents of non-standard works, the user will be able to unravel the mysteries of the environment and learn more information about the library.