At the "Libra Nihon Shibu Fuyu no Budoukai (Winter Ball)" special event on Saturday, release of the fifth volume of Kekkai Sensen: Back 2 Back manga was announced, which will bundle a new OVA. The volume will go on sale on July 4, with April 23 being its pre-order deadline.

The OVA, which will have a duration of 24 minutes, will adapt two stories. The first story titled "Zapp Renfro Inga Oohou-juu!!" will adapt a chapter from volume four, while the second story, titled "Bakkaadio no Shizuku," will adapt a chapter from volume two.

Kekkai Sensen is drawn by Yasuhiro Nightow and initially started serialization in Jump SQ as a pilot chapter in 2008. It continued as a full series in Jump SQ.19 until the magazine discontinued in 2015, where the manga had compiled into 18 volumes. Nightow continued his manga in Jump SQ.Crown during the same year.

A TV anime adaptation by studio Bones, with direction from Rie Matsumoto (Kyousou Giga), was broadcast in Spring 2015. A second season was broadcast in Fall 2017 with Shigehito Takayanagi (Dagashi Kashi) as the director. Each season was simuldubbed by Funimation while Crunchyroll simulcast the season season.

Source: @HMV_Anime on Twitter

Kekkai Sensen & Beyond OVA on MAL