Supersonic monkeys, vampires, talking fishmen, and all sorts of different supernatural monsters living alongside humans—this has been part of daily life in Hellsalem's Lot, formerly known as New York City, for some time now. When a gateway between Earth and the Beyond opened three years ago, New Yorkers and creatures from the other dimension alike were trapped in an impenetrable bubble and were forced to live together. Libra is a secret organization composed of eccentrics and superhumans, tasked with keeping order in the city and making sure that chaos doesn't spread to the rest of the world. Pursuing photography as a hobby, Leonardo Watch is living a normal life with his parents and sister. But when he obtains the "All-seeing Eyes of the Gods" at the expense of his sister's eyesight, he goes to Hellsalem's Lot in order to help her by finding answers about the mysterious powers he received. He soon runs into Libra, and when Leo unexpectedly joins their ranks, he gets more than what he bargained for. Kekkai Sensen follows Leo's misadventures in the strangest place on Earth with his equally strange comrades—as the ordinary boy unwittingly sees his life take a turn for the extraordinary.

Three years ago, a gateway between Earth and the Beyond opened in New York City, trapping extradimensional creatures and humans alike in an impermeable bubble. After the city's restoration, monsters, magic, and madness are common findings in the area now known as Hellsalem's Lot. Leonardo Watch, a young photographer who unwillingly obtained the "All-seeing Eyes of the Gods" in exchange for his sister's eyesight, came to this paranormal city to find answers to the mysterious power that he possesses. He later finds his life drastically changed when he joins Libra, a secret organization of people with supernatural abilities dedicated to maintaining order in the everyday chaos of Hellsalem's Lot. However, this is only the beginning of Leonardo's unexpected journey ahead. Regardless of the constant threat of otherworldly enemies, he is determined to uncover the secrets of his power and find a way to restore his sister's eyesight. Kekkai Sensen & Beyond follows Leonardo as he sets off on more crazy adventures with his comrades, fighting to ensure peace and order.

Shigeo "Mob" Kageyama is now maturing and understanding his role as a supernatural psychic that has the power to drastically affect the livelihood of others. He and his mentor Reigen Arataka continue to deal with supernatural requests from clients, whether it be exorcizing evil spirits or tackling urban legends that haunt the citizens. While the workflow remains the same, Mob isn't just blindly following Reigen around anymore. With all his experiences as a ridiculously strong psychic, Mob's supernatural adventures now have more weight to them. Things take on a serious and darker tone as the dangers Mob and Reigen face are much more tangible and unsettling than ever before. [Written by MAL Rewrite]

Hikari Hanazono has always been able to do things that normal people cannot. As a child, she assumed no one could beat her—until she met Kei Takishima. Thinking she would win, Hikari challenged him to a match. But things didn’t go as planned; she lost not once but each time she rechallenged him. From that point on, she has sworn to best Kei at everything, ranging from academics to athletics. To achieve her goal, Hikari enrolls in the same school as Kei—Hakusenkan, a prestigious institute for the wealthy. As a pair, they hold the top two rankings in school and are among seven of the academy's best students in a class known as Special A. While Hikari treats Kei as a rival, she is completely oblivious that he harbors hidden feelings for her. Together, the members of Special A deal with competition, friendship, and just a bit of love. [Written by MAL Rewrite]