Set during the end of World War II, Major Mashiba (Masato Sakai) and others receive an order to hide 200 trillion yen worth of treasures. These treasures are to help rebuild the country after the war. 20 girls are mobilized to carry out the mission.

The story centers around the communication between a man who abruptly appears in a world 10,000 years in the future and a boy who lives in that world.