A good adult game

Are there any that you would classify as somewhat good

I know there's a few good hentai games... but I'm not so into not-english stuff, so I only know two...
Dual Saber Justice - Single player 2d Fighting Game.  The fighting part isn't too challenging, but it's quite fun and the survival mode and number of characters  gives it pretty endless play.
Star Platinum - Single player card/puzzle game.  The card game in this is innivative.  Game's a bit old though, so I dunno how well it's aged.