Comment: the anime is not one of the best because it fails in the attempt to explain the terrible world in which Satou lives, everything is sensualized to levels that border on madness and despite some points of reflection on topics of a certain weight such as rape, the whole thing fails when everything is generalized and taken to the extreme level, in the end it tries to give a good message with a lot of moral but this is not enough to cover all the macabre and exaggerated things that are presented in the anime.
Basically, if you're looking for an anime with a lot of gore and with a respectable yandere that reminds us of Yuno Gasai, of course I recommend it.
If you have a weak stomach and you're easily impressed, it's better to ignore an anime like this one, it deals with strong topics with great stereotypes and a lot of generalization, but it gives in a way the idea of the world we live in.
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Characters: the characterisation of the characters is very particular, Satou's emotions are outlined very well while for the other characters it is sometimes difficult to understand what they are thinking.
The girl with whom Satou has a love affair is presented in a curious way, sometimes she seems to think with a woman's mind while sometimes she borders on 0 with intelligence.
Very often the other characters apart from the protagonists don't have a well defined role: they become bad and then become good again in a very short time making the narration sometimes confused.
The plot can be confusing at times and the characters very often take on the role of antagonists who try to stop Satou believing her to be a normal secondary school student, but very often the past of our protagonists will defend them from the destruction around them.
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Music: the music is very peculiar, the opening makes you understand what kind of anime you're going to watch: in spite of a nice beginning, very soon behind the opening you can see Satou's madness that will do terrible things for love; the OST is nice even if not one of the best, sometimes it gives the idea of something senseless inserted in a casual way.
characterisation of characters: 6
music and OST: 7.5
Generalisation: 5