Kekkai Sensen

In the span of a single night, human history was redefined. Destroyed and rebuilt anew, New York City was transformed into Hellsalem's Lot, a metropolis blending humdrum city life with that of The Beyond—a mystical realm transcending human comprehension. Three years later, humans and otherworldly beings have managed to coexist in a city where violence and mayhem have become commonplace. Surrounded by a near-impenetrable barrier of fog, exchange with the outside world is strictly regulated, keeping the mysteries of The Beyond well-contained within. To maintain a balance, the secret society Libra protects both the city and the outside world from its dangers.

Leonardo "Leo" Watch, a victim of Hellsalem's Lot's unpredictable madness, was bestowed with The Eyes of God, a supernatural gift that grants him superhuman sight but at the cost of his sister's eyesight. Having stayed in the city to research his condition, Leo seeks out Libra as his next lead. However, the organization finds that Leo's abilities can aid them in their cause and inducts him into their ragtag group in exchange for their assistance. Now an unlikely member of their team, Leo accompanies the fearsome but pure-hearted leader Klaus von Reinherz and the other colorful members of Libra on dangerous, high-stakes missions to ensure the safety of a city that never sleeps.

Kekkai Sensen's pilot serialization ran in Jump SQ from the February 2009 to April 2009 issues under the title Kekkai Sensen: Mafuugai Kessha (血界戦線 ―魔封街結社―), which was later collected in the first volume. The official serialization started the next year in Jump SQ.19 Vol.1 (2010/5), and continued until Vol.18, when the magazine was discontinued. The manga's second season, Kekkai Sensen: Back 2 Back, started the same year in the new quarterly magazine Jump SQ.Crown.

The series was published in English as Blood Blockade Battlefront by Dark Horse Manga from September 14, 2011, to August 7, 2018, and as omnibus volumes since September 2, 2025. It was also released in Brazilian Portuguese by Editora JBC from March 15, 2016, to August 16, 2017.