Ritsuko Sakakibara is due to give birth and her sister, Reiko Mikami, will soon enter class 3-3 at Yomiyama North Middle School. This tale explores the days of both sisters—prior to the unexpected severance of their lives—many years before Kouichi Sakakibara will enter class 3-3 of the same school. [Written by MAL Rewrite]

Another 0 was published in English along with the spin-off novel Another: Episode S by Yen Press in one hardcover volume under the Yen On imprint on May 24, 2016. It was also released in Brazilian Portuguese by Editora JBC as part of a Another complete series collection in March 2018.