You are Gunther Schwarz, a young lieutenant of Jerman army assigned to the secret project named Götterdämmerung. You are given five beautiful young (legal age) girls possessing what G-yapanese researchers call "yandere gene" to serve under your command.
They will obey your orders to the letter, and die for you.
Yet, by direct order of Supreme Krüger you are given a secret mission to awaken ultimate power in these girls by seducing them and making them fall in love with you, then breaking their hearts. Upon such emotional distress, the girl turns into the ultimate weapon known as Nibelung.
The five girls stand in the row, dressed in the uniform, knowing nothing of their fate. They salute you as you enter the room. "Andrea, Christine, Ilona, Natalie, Sophie" - each girl steps forward as you call her name, their faces stern, yet so innocent. You clutch the paper, thinking how wrong this is, but you know that bigger things are at stake.
You are the last hope of Jermany! Now go and fulfill your duty to the Fatherland!