Prologue: The Demon Reaper

Two years passed, after the death of his squad and believing that he is dead from, Kokuen has become an lone Assassin and is now in possession of a high class weapon that possesses immense powers and contains a high ranking danger beast like demon, as he went to hunt down the people in power and high ranking officers of the empire, but what will happen when he runs into someone that he thought he would never see again and alone in search of revenge.