The girls are running in their exercise outfits, with the boobs swaying to and fro. Arata's heart races. Everyone's having great time, and then a ghost appears in the library. Arata and the gang go to check it out, and are forcefully transported to the "Eternal Library". There they find the lost Trinity Seven!
Looks like things got interesting 
while I was sleeping.
Kaum mache ich ein Nickerchen,
wird es interessant.
Las cosas se pusieron 
interesantes mientras dormía.
La cosa se ha puesto
interesante mientras dormía.
Sembra sia successo qualcosa
d'interessante mentre dormivo.
As coisas ficaram interessantes
 enquanto eu dormia.