Nobunaga the Fool

Nobunaga the Fool takes place in a world divided between two planets, connected by the now-broken Dragon Stream. Nobunaga, the heir to the Eastern Country of Owari, is often seen as lazy and irresponsible by those around him, even his own father. However, he unexpectedly saves Jeanne Kaguya d'Arc, a Westerner with visions of a Savior-King, and her companion Leonardo da Vinci from a battle involving advanced mecha. Jeanne's visions lead her to believe Nobunaga might be the person she's searching for.