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...
To be taken by someone's overwhelming 
efficiency is another form of love!
¡Quedarse fascinado por la abrumadora 
habilidad de tu pareja...!
Ser dominado pela habilidade de
 alguém também é uma forma de amar!