Mahou Shoujo Isuka – Episode 2

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)
Alternative
Magical Girl Isca – Magical Girl Isuka – Mahou Shoujo Isuka – 魔法少女イスカ – 마법소녀 이스카