Mahou Shoujo Meruru

Japanese Title: 魔法少女メルル

English Title: Magic Woman M

German Title: Der Zauberlehrling

Plot
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.