Warning this review may contain spoilers.
First impressions:
So Black Bullet… we’ve got monsters and we’ve got people trapped in the walled off city. Does any of these things ring a bell? No? Ok.
Story 4/10:
So Black Bullet. The premise of Black Bullet to me seems like they just copied and pasted elements from other shows- cough attack on titan cough blue gender. Basically, there is a virus that turns people into monsters and what’s left of humanity is in a walled off city.
So one problem I had with this show right off the bat is the setting it takes place in. The world the story takes place in paints this epic picture of where humanity is close to extinction and every day is a fight for survival. There is a virus that turns people into monsters that are "apparently “ beyond human imagination because it seems that giant moths and spiders are apparently beyond human imagination, that kill other people. Humanity’s only hope is the brave warriors that fight these monsters every day.
Now probably judging from what I have said about the world this takes place in, you’re probably thinking to yourself, “why is this a problem for me?”. Well if you have asked yourself that question then I will tell you. Because while watching this show I never saw any actual survival going on. Despite how the monsters are apparently this huge danger to humanity and have killed off most of the human population everything in this world seems to be like our world except for the virus that turns people into monster. What's left of the human race is now living in walled off city going about life like nothing ever changed. There are even schools and shops that are open that people go to. You are probably going to argue “well the schools are there to train those you will fight the monsters right?”. Well if you thought that then I am sorry to tell you that you are wrong. They’re just normal schools. Because that's what we need in our post-apocalyptic setting… schools. So basically it is just another light novel version of a post apocalypse.
Another problem I had with this is show is that it couldn't seem to keep a consistent tone going. For example, the tone of this show seems to swing back and forth from dark and edgy, to school life to fan service with little girls- and yes you did read right. Fan service with little girls trying to get on the main character’s D.
One thing I did find funny was this shows attempt to be mature and taken seriously with the whole concept of super loli discrimination. Despite the reason for the super loli discrimination being very forced and seems only to be used for shock factor. It also is used to make the protagonist look like a hero who treats his super lolis with love and respect while the rest of society tries to kill them every chance they get, even though the only reason they are still alive is because they’re super lolis.
Wait… so what you’re telling me that these people are pretty much throwing away their only hope of survival? They must be very dumb to do that. I mean assume that these people were actually trying to survive, you would think that they would try and figure out exactly what would help them survive. It is like if an army person were to throw away his gun in the middle of a fire fight.
But of course we can't have actual good writing; rather, we have to make sure that these little girls are victims and suffer.
Now If you’re wondering about the actual storyline and what not, it’s pretty generic and unoriginal. It basically boils down to shit happens and main character has to fix it. And there is some sort of government conspiracy that you don't give a fuck about.

Characters 3/10:
The main character is pretty much a passive bland character that has nothing interesting and the only thing that makes him different from the rest of the character is that he is nice to his lolis and tries to make the world a better place for his super loli harem. Even though he not really trying that hard to do that.
The side characters are very bland and nothing interesting about. They are pretty much cardboard cutouts of light novel stereo types. Which aren't even that good any way.

Art 6/10:
Now, for the most part, the animation was fine. But this show had some very bad CG animated scenes. The backgrounds look pretty cool but that was about it.

Sound 4/10:
The OST for this is very forgetable. It's OP also rip-offs Attack on Titan’s OP, for some reason. The OST was done by Shiro Sagisu who worked on Attack on Titan, Berserk Golden Age movies, and Bleach.

Enjoyment 4/10:
The only thing I enjoyed about it was the loli discrimination thing. This is like racism to lolis which I found quite funny at times. I am like “oh this is racism towards lolis, I never thought that could happen but it did”. Despite the fact, that the reason for this was very forced and superficial.

Overall 4/10:
So overall, if you are a loli-con or some kind of pedo then this is the anime for you. However, if you looking for a good post-apocalyptic show then you won't find it here.