Magical Girl Overtaken by Pure Evil and Lust Magic

As the righteous magical girl Silky White, she has been fighting to protect people from the evil of the invader Noir, but she is defeated by the enemy's female leader, Nero, and is taken captive. After being subjected to Nero's lewd pleasure training, she awakens to become a magical girl of darkness. She becomes a bitch who turns on the people she is supposed to protect and devours only pleasure. ......