Oni Chichi (2009)

Marina und Airi sind zwei bildhübsche Schwestern, die in ihrem Umfeld sehr beliebt sind. Sie leben mit ihrem neuen Stiefvater, der gleichzeitig auch Lehrer auf ihrer Schule ist, unter einem Dach. Dieser Mann begehrt die beiden Mädchen und lässt keine Gelegenheit aus, um heimlich an deren Unterwäsche zu schnüffeln. Das allein wäre noch harmlos, doch dabei soll es nicht bleiben …

Quelle: www.anisearch.de/anime/5503

A chemistry professor develops a drug that makes women highly excited. So he tries it out on his niece first and it works, the girl already liked him so it wasn’t hard at all. Then he targets one of his step daughters Airai who is a tsundere one but in the end with the help of his niece and the drug she falls for it and ends up addicted to her father. Finally he targets the remaining step daughter who is am honor student and has a good boyfriend who respects her and finally have decided to have sex one night but they didn’t counted in the dad who won’t give up the virginity of his most precious daughter even if it means taking it by force.

Source: www.anisearch.com/anime/5503