Hikari and her sister are off for Europe.  But their plans are interrupted when the Fusou naval fleet is struck by a newly emerged Neuroi nest.  It's up to Takami to defend the fleet against this unexpected threat, but she's overwhelmed by the sheer number of enemies.  When she uses a dangerous technique to stave off the foes, it's up to the inexperienced and underpowered Hikari to protect the fleet...
My sister was sent to Petersburg in Orussia.
أُرسِلَتْ أختي إلى سانت بطرسبرغ في أوروسيا
Schwesterherz soll in Petersburg,
Orussia, Stellung beziehen.
Takami irá a Petersburgo, 
en el Imperio Orussia.
Takami irá a Petersburgo,
en el Imperio Orussia.
Takami a été envoyée à Petersburg,
dans l’Empire d’Orussia,
Mia sorella andrà a Pietroburgo
nell'Impero di Orussia,
Minha irmã foi mandada para 
Peterburg, em Orussia.