The girls have to deal with the aftermath of the Ouroboros attack. Their fighting power has been greatly reduced, and they soon find out that things are worse than they had feared when some of the members are corrupted by the darkness...
But you said you were. 
That's why you're not good enough.
بينما أنتِ قد قلتِ ذلك
Saya-chan, das posaunt man
nicht heraus. Du böses Mädchen.
Pero tú lo dices. Por eso no basta.
Pero tú lo dices. Por eso no basta.
C’est bien que toi,
tu n’en fais pas assez !
Tu invece lo gridi ai quattro venti,
per questo non è vero.
Mas você disse isso.