Haruka and Mamoru take to the streets, fleeing the deadly invisible enemy that pursues them. With Mamoru wounded and his sword blunted, Haruka fears that prolonging this fight will only end with her protector's destruction. But Mamoru has not been relying on his strength alone. Igawa has been working behind the scenes to counter the assassin's drones...but is the pair's technical expert up to the task of disabling government-grade weaponry? Or has Igawa met his match in the world-class hit man, Fang?!