Himitsu no Yakyuken
A yakyuken game with lots of animation. You are watching porn on your computer and polishing your dolphin to it when, suddenly, your hot girlfriend rings your doorbell, and she's clearly not wearing a bra. The two of you decide to play yakyuken. If you win, at certain points, you will get to choose what she takes off, but all wins will show an animated strip scene for her. Should you happen to get her naked, you are then treated to a somewhat interactive sex scene, though if you lose, she just gives you oral sex. Artwork is quite good, and there's a bit of a twist ending after the sex scene if you happen to win...