Haha this game was pretty fun repetitive though but when you have half naked asian chicks all bouncing around it makes it a little better.
Basically you and your sister kill a bunch of zombies with samurai swords. You can customize their outfits but the basic one is a bikini and not sure about the other chick.
Only thing I didn't like was that once you hit blood rage mode it drained your health and wouldn't stop until you got healed.
The other thing is that for a few enemies you have to kill them in a certain way there's a button combo you have to hit.