1586, Kyushu――The Shimazu clan of Satsuma, hailed as the most fearsome in the Sengoku period, vanished in the midst of their war for Kyushu unification…!? Where they had transported to was about 1,300 years before the Sengoku period, in the middle of the Great War period that decided the fate of the empire: 3rd-century Rome―― The "Oni-Shimazu" run wild on the stage of Rome in this Sengoku spectacle action epic, begins――