Captains! Shicksal needs your help Navigating our most ambitious B rank Valkyrie Kiana Kaslana! There as been an Honkai Eruption in Soukai City, and we need to take care of it quickly or else Mei sempai will be too exhausted and Kiana will "cook" for us. The lives of Saint Freiya's Squad V rests on your shoulders. Ai-chan believes in you!
Kiana! Quit drifting off to dreamland! You can fantasize about impressing Mei later! Where did this Battleship come from? Maybe we should leave this mission to Himeko-Sensei...
2 Years 5 Months, 16 Days since the 3rd Eruption at Nagazora, Japan. (2013)
A massive Battleship has appeared in the skies near Soukai city (Shenzuo). All communications are silent and the ship is losing altitude. If it crashes, all 34 million of Soukai City's residents Schicksal has sent Valkyrie Squad V from Saint Freiya Academy of Valkyries to board this mysterious ship.
Named the Selene, it contains tech that is far beyond the current era. The ship has a message offering this ship to Kiana if she can retrieve 4 Gems. The Gem of Desire, Haste, Serenity and Conquest.
After accessing the bridge, Bronya Zaychik loses control over herself becoming Black Nucleus. With the help of her squad, she is subdued and released from the mind control.