User Summary One day Ariel, an ordinary schoolgirl, is left after the classes by her biology teacher. The teacher, a pervert, as every girl in the school seems to know, seduces Ariel. While he does it, he is transformed into the Overlord, a creature who seduces and tortures girls and young women. She gains powers and creates a portal to try to stop the Overlord by using adult situations to destroy his influence through WWII Germany, present time Tokyo subway train and distant future.