OVA bundled with the 14th manga volume. Story about a joint practice session between Izuku's class and Isami High students at Yuuei Academy, takes place after the field training arc in the second season.

Metropolis of music, MIDICITY. A kitty girl wearing gothic lolita clothing named Cyan is scouted by Maple Arisugawa, the president of a music agency. From there, she meets Chuchu (a pun off of the sound that rabbits make) the honor student rabbit girl, a net geek dog girl named Retoree (from "Retriever"), and an alien sheep (?) girl named Moa. Together, they form the band named "Plasmagica," and aim for the top of the world. However, the path there is long and tough, and keeping in high spirits is important. By battling against other strange bands, Plasmagica slowly grows toward a top-grade band. In the end, they'll be a band that becomes the driving force of MIDICITY's music industry... Maybe? Gonna be a music millionaire! (Source: Sanrio)

Happy-go-lucky short stories of daily lives of the band members of Plasmagica and ShinganCrimsonZ.

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.