Mahou Shoujo Isuka
Genres: Hentai
Type: OVA, Episodes: 3
Aired: Apr 24, 2010 to Aug 26, 2011
Studio: Studio 9 Maiami
Source: Visual novel
Rating: Rx - Hentai
Synopsis:
The evil stone conceives a part of the king of the hell's power in a different world. To prevent his revival, the stone is implanted into a body of a magical girl! Now the clans from the hell follow after her. The evil stone cannot be regained by a simple destruction of the body. Thus, they start disgracing the magical girl in various ways!

(Source: dlsite)