Time is Sengoku period. By suddenly flying "demon", Hinomoto is completely changed. The famous sengoku daimyo is died and the "demonic" dominates the human being. There is a group called a samurai who fights in search of freedom in this world where "demons" are worshiped as gods. Two boys admired by the Samurai group stood up to regain the world of humans! Dream is "the strongest samurai group"! Sengoku Battle Fantasy, opening season!