This anime is a challenge to the senses, containing both disgusting and sublime imagery, and a synth-heavy pop dance soundtrack that will get you grooving despite yourself.
The sensual transformation sequences and suggestive subject matter make it ideally suited for the 13-year old hormonal boy in all of us, and its nearly blasphemous depiction of angels and religious figures makes us feel a bit guilty for taking such pleasure in its racy, uninhibited nature.
But to look at the surface would be to miss the core of what the show is really about. Instead of a solely sexual mind-trip, this anime takes traditional Japanese values and turns them on their head.
The clues to this revelation are in the lyrics of the music the angels sing, and in the rivals they face.
Anarchy seems to be the trait that the heavenly duo seem to endear, with an unabashed indulgence of their sexual and physical desires. Meanwhile, their demonic counterparts are all about rigid order. (Their costumes are often based upon the uniforms of the 3rd Reich).
Traditional Japanese society tells people "the nail that sticks out gets hammered down" while this anime says, "be yourself, and screw the consequences" - it is making an appeal to the youth of Japan to grasp for freedom despite the consequences, reminding me of the kind of things that led to the cultural revolutions of the 60s in the US.
Look deeper and you will see even more.
And even if you don't want to be bothered with deep messages and subplots, you can unplug your brain and enjoy the random sexy adventures of two crazy angels having a good time.