Mahou Shoujo Meruru
English name: Magic Woman M
Genres: Adventure, Fantasy, Hentai
Type: OVA, Episodes: 2
Aired: Jan 21, 1997 to Apr 25, 1998
Source: Manga
Rating: Rx - Hentai
Synopsis:
A newly trained young sorceress name Meruru gets lost in the forest in the middle of the training, and has numerous lurid encounters with unsavory characters and lustful beasts. When aroused, Meruru attains the state of ultimate ecstasy and unleashes an explosive power from within.

(Source: Wikipedia)