The Celaeno Library in the Pleiades star cluster is home to the largest book collection in the universe. It's said that even variants of Yiu-th only handed out at events can be found there. Mahiro is dragged along for some reason as Nyarko goes there to return a book. Hasuta, a former worker at the library, does his best to show Mahiro around, but they soon encounter two evil deities who have infiltrated the library...
The victory condition was 
to not harm the books,
Como la condición para la victoria 
era no dañar los libros,
A condição de vitória era
 não danificar os livros,