I honestly have no idea why I read this entire manga. I suppose I got sucked into the initial premise, which was interesting, and then by the time I was fairly invested in it, it started to really grate on my nerves and I finished it out of spite.
The premise of killer lolita/magical girl robots (?) was interesting, I must admit. The gore was very over-the-top, so if you have a weak stomach, I wouldn't recommend this manga.
The story starts off leading you to believe it will revolve around the survival of the characters during the Magical Girl Apocalypse, but it actually gets quite a bit more complicated as time goes on. By the end of the story, it's downright ridiculous. New plot threads and characters are thrown in consistently, and it was a bit difficult to keep track of who was who and what their part was in the overall story which became increasingly convoluted as time went on.

However, the biggest drawback to the entire manga was not the story, but the characters. None of the characters had any unique personalities, interesting backstories, or character development. Even the main character (Kogami Kii) had no traits that I can name off the top of my head that made him stand out.

This manga also has the inclusion of one of THE MOST unlikeable characters I have ever seen in a manga. Specifically, Akuta Rintarou. His entire personality (if you can even call it that) revolves around being a disgusting pervert the entire time. All he does is lust after high school girls, specifically Yoruka Hanzawa whom he calls "Lil' Miss Funbags" in reference to her gigantic knockers. He literally spends the entire manga doing nothing but trying to bang her, or masturbate. He's also a sociopath who literally cares for no-one and only steps up to defend Yoruka because if she's dead, how can he have sex with her? (Not that he's picky about having sex with a corpse.) I expected him to get killed off early on (in fact, I prayed for it to happen) only for him to play a central role in the plot and become some sort of hero later on, even though that goes against his whole "I don't care about anyone" schtick.
Pervert characters play a role in a lot of different manga, but they offset this with the inclusion of interesting backstories, and the fact that the pervert aspect of their personality doesn't define their entire character. Akuta fails in this respect because that literally defines everything about him. Caring for others? Nope. Being selfless? Nope. Forging any meaningful connections with other characters? Nope. Having some sort of goal beyond wanting to grope Yoruka's titties? Nope. He's a completely loathsome asshole with no redeeming qualities.

Over time, the story continued to become more and more ridiculous until it ended. It had a happy enough ending, for those of you who actually care about stuff like that.

Art-wise, it was good in some aspects, but terrible in others. The author has good attention to detail, especially when it comes to city-scapes and backgrounds. However, his art fails spectacularly in the anatomy department. Strange proportions, skewed faces, poor hand/feet anatomy... he should maybe practice drawing people a little more. The designs of the magical girls was also pretty creative, as well as the horrifying powers each one possessed.

Overall, this wasn't the WORST thing I've ever read. There was some interesting ideas here and there, but all of it was completely ruined by the lackluster characters.

3/10