Four years ago, Holy Knight Saito suppressed the evil monster girls and became Paladin Saito. Our savior! The world finally seemed at peace… until something tragic happened on his wife’s birthday. It seems that the monster girls have come back, and they captured his daughter! Saito was convinced that they want revenge but it isn’t going to happen on his watch! Help Saito battle massive waves of monster girls or they will take advantage of him!