18+ Lemming Kyousoukyoku

Immoral angel is the story of Reimi, an innocent college co-ed, who has been lured to a lonely mansion by an evil scientist who is fascinated with the psychological reactions of animals and humans to stimulation. Reimi is a captive, forced to bring exquisite pleasure to this mad scientist, while the teacher she had a crush on begins to train as a martial artist.

(Source: archonia.com)