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.

Have you heard of Hell Correspondence? Those with a powerful grudge may only access this mysterious website at midnight, allowing them to enter anyone's name and have that person be ferried straight to hell. Ai Enma, the Hell Girl, will not judge whether or not the chosen target deserves punishment; she will merely exact revenge on them for you. Not much is known about this young girl other than that she swiftly carries out her tasks with the help of three straw dolls. There is just one catch, however—as payment for carrying out such a request, the user must condemn themselves to an afterlife in hell. [Written by MAL Rewrite]

Half-demon twins Towa and Setsuna were always together, living happily in Feudal Japan. But their joyous days come to an end when a forest fire separates them and Towa is thrown through a portal to modern-day Japan. There, she is found by Souta Higurashi, who raises her as his daughter after Towa finds herself unable to return to her time. Ten years later, 14-year-old Towa is a relatively well-adjusted student, despite the fact that she often gets into fights. However, unexpected trouble arrives on her doorstep in the form of three visitors from Feudal Japan; Moroha, a bounty hunter; Setsuna, a demon slayer and Towa's long-lost twin sister; and Mistress Three-Eyes, a demon seeking a mystical object. Working together, the girls defeat their foe, but in the process, Towa discovers to her horror that Setsuna has no memory of her at all. Hanyou no Yashahime: Sengoku Otogizoushi follows the three girls as they endeavor to remedy Setsuna's memory loss, as well as discover the truth about their linked destinies. [Written by MAL Rewrite]

This OVA takes place in between episodes 8 and 9 of the first season of Hakuouki. Yukimura Chizuru goes on a reconnaissance mission in Shimabara as a geiko for the Shinsengumi. Each episode unfolds the events of the days leading up to, during, and after the operation. It intermittently reveals each captain's involvement as well as that of a few demons in the affair. Each individual episode primarily focuses from the third person perspectives of: Okita Souji, Saito Hajime, Harada Sanosuke, Toudou Heisuke, Hijikata Toshizo, and Kazama Chikage.