You play a man who fights girls from something like 1 star up to 5 star. You can rip their different pieces of clothing off using specific grabs there are also many grab moves you can do which are listed as rape moves and from what I can see those grab moves reduce their super combo bar. Each girl you beat you get to pick one article of clothing she was wear that you can keep for customizing a girl. You also are rewarded with money which can be used to buy those same articles of clothing you would get from beatings girls from the store instead.
Tips on higher level ones like 4 star and 5 star. If you knock them down and are far enough away from them they'll sit there playing fucking possum till you get close enough to chump hit you. If you are far enough away and they do this just use the up and towards button quicklt to move slightly to edge close enough to them to just use the low kick button on them till they die. Another move that they are all weak against is spamming the back arrow + D which causes the player to slide away and then slide back in with a sliding punch.