Blood Blockade Battlefront (also known as Kekkai Sensen) is a manga about Leonard Watch, he is dragged into the city of Jerusalem's Lot and has acquired a power called the "Eye of The Gods;" this makes him see things that others can't. Leonard becomes involved with the group Libra which is a group of supernatural humans, as well as monsters, who help non-humans that the "police" cannot.

The first problem I have with Kekkai Sensen is Leo's "Eye of The Gods," he always discovers a new ability with his eyes almost every volume. This makes it seem like the author can't decide what Leo can or can't do. In the first volume he could see different things that other couldn't, in another, he can suddenly create illusions, then he can use his power shock people; there seemed to be no end to the limitations of his power. However, no two people have the same power(s).

The next problem is the story, it begins to become pretty random throughout the manga; after the first volume, the plot lacks direction. A new character gets introduced every so often but most conflicts are resolved in one volume. After the first volume, it begins to take on a slice of life "feel."

Despite this, Kekkai Sensen is a funny manga, I laughed as much as I was confused by the seemingly random writing; some of the tangents are quite funny. The characters are well developed, the story was presented well, and reading it was a great experience. I recommend you read this manga if you like serious fighting involving supernatural stuff but also where you can find comedic relief.