Saburo is a high school student good in sports, but not very good with his studies. One day, Saburo travels back in time and arrives in the Sengoku period of 1549. There, Saburo meets Nobunaga Oda who looks and sounds just like him, though he is physically weaker. The son of a warlord and magistrate of the lower Owari Province, Nobunaga Oda asks Saburo to take his place, giving him a chance to attempt to unify the country of Japan in his place.