The villain in Desert Jewelz kidnaps one of the girls because she is "pure of heart." Later he keeps referring to her as the "pure one" while giving a lewd smile. His kidnapping the girl in the first place is odd, as his accomplice is the same age and seemingly also pure... Until you realize the lewd looks he gives her as well, and the fact that she was more or less living with him at the beginning of the movie. It doesn't help that he's basically her father figure.
The girls get lost in the desert at one point and worry about getting kidnapped and forced to join a harem. Bonus points in that they're actually dressed in harem wear the majority of the movie.
Most of the outfits in the franchise are pushing it, but special mention goes to Allonce's outfit in the animated series: A bra and a skirt so short something undesirable would have been seen if the characters were actually anatomically correct.