Seifer, a 66 year old criminal, uses the main fruit of his teacher's life research, 'Young Maiden', to become a young girl. Having also recently completed his own research on how to obtain unlimited mana, he now seeks to fulfill his desires for power, revenge, lust for beautiful girls, as well as regain the penis he lost from changing genders. Through moral degeneration and corruption, he seeks to turn these girls into extremely loyal, horny followers. For every girl he corrupts, his total mana grows and he inches closer to his perverse goals.