The planets of the East and the West were once connected by the Ama-no-Hashidate. The culture that built it was destroyed countless years ago, and the two planets have had separate histories ever since.
On the Western planet, ancient culture is experiencing a renaissance after a long period of war. Jeanne Kaguya D'Arc, a girl from the Western Planet, was prophesied to be the Savior of the World at her birth. With Leonard Da Vinci, she lands on the Eastern Planet, where Nobunaga "the Fool" longs for the power to change the world, as his planet is still locked in a war where many heroes vie for supremacy. When these two people meet, the culture of both worlds will be transformed.