Oni Chichi

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 stepdaughters, 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 stepdaughter 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.