Yeah, it's by StudioS, an eroge company that's well known for catering to Japanese ryona/guro fetishists. This game is VERY NSFW, but it's actually pretty tame by Studio S standards.
(if you're REALLY curious, though, look up "Battle Slave Fantasia". It's basically this game, only with more murder and less pretenses towards being a legit fighting game. I briefly considered submitting it during Mortal Kombat ripoff week, but it's outright porn and wouldn't fly with the censors)
if you creepy morons love this garbage so much just search youtube for ryona and declare a theme week and knock yourselves out or better yet kill yourselves