This anime is based of a doujin manga (I'm pretty sure it's a doujin hentai manga but I'm not 100% percent sure) called Mahou Shoujo written by Raita. it is currently about 10 volumes long and about 25-30 pages per volume. You won't find it on MAL because it was not written and published by a real writer (in other words because it's a complete doujin).
I am going to split the ratings for this anime in two ways: one for the people who read the manga and the second one for people who did not.
Story (for people who have not read it) - 2
rated this a three because if you are like me and just happen to come across this and say: oh, look, a six minute anime, let me just watch it to say that I watched it, and had never read the manga or heard about this anime before you do not understand what's really is going on. I mean the basic idea of this is not like impossible to figure out but it leaves you going why are they half naked, why do they turn into angles, what are they, who are they, and so on .
Story (read it) - 6
I give it a six because it is pretty much totally cliché. Guy meets girls, girls like guy and they fight over him, girls transform into almost completely naked angles and fight tentacle monsters. I am not saying that it's completely unoriginal, I'm just saying they could have added more to the story and changed it up some. I can't really judge too much because I have not read all ten volumes; I only really read one and I am not supposed to talk about the manga. All I have to say is that it's borderline OK.
Art (for both) - 10, outstanding
The art in this short anime clip is amazing and from what I have seen in the manga it's great there as well. All the characters have eyes and full body features they don't look rushed and move as well as look amazingly good. What I mean is that there is barley any detail untouched. The background is greatly drawn and has full detail. Heck, even the background characters are different and unique. Simply said, it is amazing. Most doujin anime and manga I have seen do not go through as much effort to look as these. I would go as far as recommending this anime just because of the art.
Sound (both) - 10
I know there really was not much music in the anime but in the parts where there was music it was really well placed and really enjoying to hear. As far as the voice acting goes, it was good at well. The voices matched the lips, none of the voices were annoying and the voices matched most of the characters great.
Character (not read) - 2
The reason I rated it a 2 was because I was looking at it from a development point of view. I know that it is only 6 minutes long and it was just a part of the whole series (there are no more animated versions) but I have to rate it like this was the whole series and there was no character development at all in this anime.
Character (read) - 6
Like I said before I have not seen all of this series but from what I have seen there has been a lot of character development up to this point.
Enjoyment - 9
My overall enjoyment for this series is a 9. Even though I had not read the manga when I watched it I still ended up not regretting watching this anime. I personally enjoyed this anime very much. I enjoyed the music that I heard, I absolutely loved the art and all the boobies hanging around. In other words, I really like the fan service.
Overall enjoyment - 7
I got this by adding all my scores and taking the average. My final thought was that these where six minutes well spent. I really loved it and I recomened to anyone take 10 minutes tops out of their time to watch this good episode of anime and I also recomend people to take some time to read the manga. I recommend to read it not just for the hentai parts but to enjoy the story.