Wakana Mashiro, a woman who smiles brightly and shows off her cute double teeth, can't help but feel a little anxious about her first anal sex! Her undeveloped anus can barely hold one of the actor's fingers, but as it continues to be developed comfortably, it loosens up enough to fit three fingers in! Gradually, her body learns the true pleasure of anal sex and grows to the point where it can accept a big dick in both holes at the same time, climaxing violently over and over again!