I Wished for a Girlfriend to Drop from the Sky, but Why Is She Driving a BMD?

Erich Schmidt, an anime-loving shut-in, finally meets the goddess of fate, who grants him three wishes. "I want a girlfriend who drops in from the sky, to visit anime pilgrimage sites in Japan, and to watch Cold War hot spots!" says Erich. And so, he transmigrates. When he wakes up, he finds himself wearing a National People's Army uniform, holding a military map of the Greater Tokyo Area, and having just parachuted into an open field. Beside him is a beautiful VDV major from the Union Army who has just landed too. "Captain Erich, would you like to join my unit in 'climbing Mount Narodnaya'?" asks a bright female voice by his ear, drowning out the noise of the BMD airborne infantry fighting vehicle.