You decided to go to your girlfriend and show off your new body, turn her into a kyuubi and then claim her as your mate. You looked around and found several more boxes of beast briefs and found a piece of paper. On it said that all the briefs will turn those who wears them into kyuubis which was a error in the shipping order. If those who wear them have sex with a human, the human will turn partly each time till they are fully turned into the species the one who has been fucking them is. The letter was from eight years ago so no one will miss them.
You took all the boxes which was a total of ten with 60 beast briefs each into your van and headed to your girlfriend's home having a key to her house. You drove towards her home as you go above the speed limit not noticing do to you jacking off on the thought of claiming her pussy as she becomes a anthro kyuubi. You didn't notice you were swaying left and right on the road till you hear the sound of the cop car. You finished jacking off cumming as the cop came to your window.