It is already bad enough that I live alone with a troublesome sister. Now worst of all, I met a person who claims that I was them in their past life. I am now forced onto a quest to find this long lost girlfriend of faith. Len x Rin

Len Kagamine, Now born legend, has survived the battle of Siberia but lost his memories. He has one chance to get his memories back, but that chance has lots of obstacles. Rin, the commander-in-chief gets nightmares every night about her childhood and her parents. Both of them are key elements to defeating the Germans in every way possible.

In the middle of WWII, a small number of Soviet soldiers and tankers fight for their lives in Siberia defeating the only obstacle form the advance into Germany. Along with them are Rin, former Nazi Officer Len, and couple other generals. As the battle rages on, Rin plans an all out attack to knock the Germans out of Russian territory and back into their homeland.