One of the few doujin adult-content games that's actually a game, you play a female agent who roams a enemy prison to rescue girls. The game is pretty easy, basically the only way to lose is to get very unlucky towards the beginning, or run into the boss without a full arsenal of weapons. Hentai content takes the form of the girls you rescue, and the boss if you beat her. There's only one level, but it's easy to play.