I'll start my rewiew summoning my opinion about this manga: it's terrible.
This rewiew have some weak spoilers you can easily find in a more detailed synopsis.

THE PLOT(1/10): I just couldn't see the point of it. If you look at the cover, you'll probably think it's an action manga, right? Well, it is, and it's also ecchi, "gore", and it tries very hard to be romantic, but it just... fails, in every single aspect.
The story is about Senguu, a teenager who moves to the big city to fulfill the promise he made to his grandmother, which I mean: finding a good fiancée for himself. Firstly, I'm pretty sure that when his grandma asked him that, she didn't mean that she wanted him to marry the FIRST FREAKING GIRL he found (I don't think what I just said can be considered a spoiler because it's literally the first thing that happens in the story. You open the manga and it has a photo of Akari with the words "by the moment I first saw her, I knew she was the one who would be my wife" or something).
After this scene, a empty, lifeless and meaningless love begins. I didn't really hoped Akari and Senguu got together or anything, I just felt like "that's ok, he cares about her, they'd make a nice couple, they should get together". I couldn't feel the thrilling, the pity, the beauty of that love, ANYTHING. It just look more like a nuisance than an actual feeling, because it stops and forces Senguu to make lots of things which put his life in danger. And of course, he acts like a complete idiot. I actually felt sorry for him.
The action scenes are confusing: you can't see who killed who, who is attacking who, sometimes you even forget what's the reason they are fighting. I won't even mention the "gore" scene; completely useless. It just happens for no reason. For me, it looked more like a pathetical trial to shock the reader. I think that if the manga were longer, the scenes would make more sense.
The hole manga is an ecchi. There are boobs everywhere, and I MEAN it. It is in, I don't know, every two pages? It's just unnecessary.

ART(9/10): Well, the only good thing I can say about this manga is that the drawing is awesome. I liked the details of the monsters, and the shape of the caracters (although their bodies, in general, were quite out of standard). I found this unique and very nice.

CHARACTERS (2/10): Both the two main characters and the secondary characters have, at MOST, two sides. They are shown very quickly, at the point you can't remember the name of them, or their powers, or why the heck are they even been mentioned. Even the ones who were supposed to be crucial could be easily removed from the story. I reinforce the idea that if the manga were longer, it would be less confusing.

ENJOYMENT (3/10): I surely haven't had fun reading it. The most excitment I felt was at the end of the first and the second editions when I thought "damn, I wonder what will happen at the end" but without that adrenaline I use to feel in mangas like that. Next year, I probably will have already forgotten that this manga even passed through my shelf.

OVERALL (2/10): This manga looks more like a load of ideas who were thrown up in some paper without having any relation with each other whatsoever.The art is good, and it had some potential, which was wasted. That's basically all.