La Blue Girl: Climax Taizen (2002)

Miko Mido is a teenage girl who is to be the next leader of the ancestral Miroku ninja clan. But the Suzuka clan steals the treasured compact that symbolizes the truce between the Miroku and the Shikima, a race of perverted otherworldly demons, and soon Miko has to use the sexual techniques of the Miroku to survive the assaults of the demons and protect her sister. After learning the truth behind her heritage and the identity of her true parents, she embarks on a journey to become a real Miroku ninja and would have to fight an ex-mistress-turned-traitor of the Miroku clan. A Compilation of the first four episodes of La Blue Girl.