Princess Lexia's older brother, Reigar von Arselia, was poised to inherit the throne. At least he was...before tragedy struck. Now, Reigar's heart has been twisted by madness and plunged into a darkness so deep, a black hole would feel bright by comparison. What will happen when the Vile girl pulling the strings and bending Reigar to her will comes face to face with Yuuya--who now possesses the power of a saint!?