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!
And I even get to see 
her Archsymphony, no less!
Ich hätte auch nie gedacht,
dass ich Yui-sans Archsymphony sehe!
¡No pensé que también vería 
la Archsymphony de Yui-san!
¡No pensé que también vería 
la Archsymphony de Yui-san!
On a même droit
à son Arch Symphony !
Inoltre, potrò vedere 
la Sinfonia di Yui-san, è incredibile!
Nunca pensei que veria a 
Archsymphony da Yui-san, também!