The husband who ran a small town factory was prototyping parts for a rocket engine. "Someday, we want to launch a rocket with an engine we made ourselves..." That was both the husband's dream and the wife, Sana's dream. One day, they received a contact from Musashino Heavy Industries, a major corporation. They wanted to buy the patent for the plug system, which was essential for launching rockets, for 2 billion yen. Weighing her husband's dream against 2 billion yen, Sana, who was in charge of the town factory's finances, made her decision...
