Mahou Shoujo Lovelion

There is a school at a quiet residential area. Adalaid, a monster, has an eye on Ayumi and Aoi, who are students of the school, and decides to take them hostage by changing libido and pleasure into evil power. However, she is interrupted by Mana, an angel. Not only interrupted, Adalaid's power is removed and she is defeated by Ayumi and Aoi, who became magical girls.

Adalaid somehow runs away... She gets mad and calls up a monster, Claudio, and orders him to take revenge on them...

[From ErogeShop]