After the fall of Avalanche, Tifa's new duty became satisfying sex-crazed men. Good news: Tifa's curvaceous has no shortage of stamina. Better news: there's no shortage of men and how much semen they can dump on Tifa either.
The freshly captured girls are always resistent at first, but once they are branded they realize what their new life will be and after the first training sessons they all turn into nothing but fucktoys (tixnen)