Mahou Shoujo Ai San: The Anime
English title: Sexy Magical Girl AI
Japanese title: 魔法少女アイ参 THE ANIME
Type: OVA
Episodes: 3
Source: Visual novel
Genres: Supernatural, Hentai
Studios: Anime Antenna Iinkai
Producers: Milky Animation Label, MS Pictures
Duration: 26 min per ep
Rating: Rx - Hentai

The danger from the demonic Yuragi is greater than ever.
Shin, a particularly powerful Yuragi, has united the solitary night creatures under his leadership and fathered a daughter with Mahou Senshi Rin.

With her help, he plans to create a paradise for his species driven by primitive instincts. The battle companions Ai, Meg and Rin try to put a stop to Shin's activities, but the tentacle-armed monster in human form seems almost overpowering...

(Source: anisearch)