Mahou Shoujo: Earth's Last Hope

It is over. The Radiant Gem Maidens, the most powerful Magical Girls in the world, led by Magical Girl Heart Ruby, have been defeated by the Demon King. Now, they had been corrupted and turned into his most powerful and loyal generals, and they have gone on to begin their conquest of Earth with no one left who can stop them. You were once their 'manager', for lack of a better word. However, with the world itself at stake, Kuro, the magical mascot character that always followed the Gem Maidens around, has bestowed the power to become a Magical Girl upon you. You are the world's last, best hope as you now need to overcome not only the Demon King that defeated the strongest Magical Girls the world had to offer, but also those very same Magical Girls, your now-corrupted friends. (For best experience, update Plot Elements and relevant Story Cards with major changes, such as saving one of the Gem Maidens.)