Just gave the demo a try:
Story: A Bimbo Knight and a Flat-Chested Thief go on a quest in the forest. That's pretty much it... let's be honest. You've seen these girls before, in other games of this genre. (6.5/10).
Gameplay: Actually pretty decent. The upgrade menus are a bit awkward in that it's hard to figure out if any upgrades are worth picking over others, and a hint about preparing your multi-target attacks would have been nice. The combat is enjoyable, but it was kind of annoying to see that pretty much every enemy would use lust attacks and there is no way to prevent lust buildup, because there is no way to decrease lust outside of town. (7.5/10)
Artwork: It's decent. The gallery was pretty nice. (8/10)
I would highly recommend cutting out the voice acting. The current voices are not fun to listen to.