Nobunaga Concerto

Saburo is a high school student who excels at sports but struggles with his studies. One day, he unexpectedly travels back in time to the Sengoku period in 1549. There, he meets Nobunaga Oda, the son of a warlord and magistrate of lower Owari Province, who looks and sounds exactly like him. However, Nobunaga is physically frail and asks Saburo to take his place. Now, posing as Nobunaga, Saburo sets out to unite Japan under his rule.