Well , I'm pretty sure the Anime buds here are aware of the Anime , Freezing which was pretty much nothing more but fan service , but the Manga have a different tale to tell.

The story is generally more indepth , but the selling point of it is not the storyline , which is not really that good in the sense that it bears a unique concept but the morality concept of the Manga itself.
Why , just about every girl in this Manga have a short-temper and is more than ready to kill , it's surprisingly disturbing to see what these girls are capable of achieving. It's almost like having a Yandere for every few chapters or something.

What I also do enjoy is the miniature tale the story bears for various characters , building on their foundations and the strength of their character by giving them a pretty tragic past.
Even the heroine , Satellete herself had some pretty bad memories to think back to.

Despite being a generally disturbing and dark Manga with indications of torture and madness contents , it does provide an occasional breather , such as when Stella gets all flustered when the MC gets near her. It's kinda funny how she mind goes blank and starts walking like a machine when she gets too embarassed for words.

Generally speaking , it's preferable to read the Manga instead. It had , for one , totally changed my view of the series as a whole. Still , I reckon I'd watch the Anime once I'm done with the Manga.