The gateway to the netherworld continues to expand to the point where it has started to consume the real world. Complete demise creeps ever closer as time passes. After miraculously managing to rescue Hiyori, the girls prepare to face Princess Tagitsu with the hope and fate of the world resting on their shoulders.
or any frequency of sound waves.
.لا يمكننا رصد ما يجري خلفها
wir können einfach nicht erkennen,
was dahinter vor sich geht.
no podremos ver lo que hay más allá.
no podremos ver lo que hay más allá.
non riusciamo ad analizzare cosa stia 
succedendo dall'altra parte.
simplesmente não conseguimos
observar o que acontece além daquilo.
что происходит по ту сторону.