Devil Mettsar of Parallel world which demanded conquering the whole nation by force was Sealed before, magic warriors who win peace. However the gate to Hell is newly opened, to invade the ground it is schemed.

Though the magic warriors who notice the movement and ambush, it is not possible to work effectively, it is defeated on the contrary at demons who improve power. Furthermore, the citizens who are agitated and turn into a mob also attack the magic warriors...

Such an inside, having saved them, it was Sylva and Falke who had opposed before. They struggle jointly to the magic warriors to seal off the opened gate, it succeeds in the demons repulses.

However, another intention existed on the back side of their cooperation. It uses power from the gate, revive sealed Mettsar.