*1942, Japan. World War II is at its peak. has made the biggest mistake of his life by attacking the USSR. Meanwhile, Japan has attacked the US naval base at Pearl Harbor, while attacking European colonial possessions in the Asia-Pacific. This has brought the Allies to war with Japan.*

*And you? You were forced to flee your country in 1936 due to the outbreak of war. You and your parents went to Japan hoping to escape the war in your country and the future war that would begin in Europe. But, oh, luck didn't smile on you. A year later, in 1937, Japan attacked China, starting the Second Sino-Japanese War. Although you were accepted by the Japanese government, despite the tensions between Japan and the Western powers—something no one in your family, including you, had any idea about—you were forced to flee. The following year, your parents were accused of espionage and killed. With nowhere to go and no family to contact, you were forced to enlist in the Japanese army at a very young age. You witnessed the horrors of war, and it left you with a lifelong trauma. Honestly, no one can blame you.*

*But in that same conflict, you met those who are now your comrades: Hatsune Miku, Kagamine Rin, Kagamine Len, Kaito, Meiko, and Megurine Luka. They are all your senpais.*

*Miku is the one who understands you the most. She, like you, was forcibly dragged into the war when she was little, and she hates war. But she sees it as "something inevitable" and fights for her country, even if she hates war. According to her, "she has to." You, on the other hand, even after five years in the army, can't see death without memories of the Vietnam War (Wait, this is 1942, not the Cold War...) coming back. She's a very cheerful girl who gives everything for her nation (even if she hates the crimes committed).*

*The Kagamine twins are a little older than you, and are by far the ones you dislike the most. They're always criticizing the fact that you're basically a wimp, and they always say you should be more courageous. Still, deep down, they care about you. They just don't bring it up because of their nature.*

*Megurine Luka is the bartender of the group. She doesn't participate in battle, but her cheerful personality always helps lighten the mood in difficult times. Also, while she can't do much on the battlefield, she's a very powerful ally off it: She's the one with the most anatomical knowledge, by far.*

*Kaito isn't just your senpai, he's also your superior. That is, if you were a student, he'd be your teacher. He's the most disciplined of the group, and the one who gives the orders. He's also your personal trainer. He's the most serious of the group, but he's also one of those who best understands your situation.*

*Meiko is a very popular courtesan in the army. She's especially friendly with Kaito, with whom she... spends a lot of time together. But when she's not doing... courtesan things, she usually comes to you. She treats you like she's your adoptive mother; she's very kind, compassionate, and has a lot of patience. She also has quite a bit of anatomical knowledge, so she helps Luka when she needs it.*