Set in a post-apocalyptic world dominated by numbers, every human being has their worth measured by a special "Count" imprinted somewhere on their bodies, which defines any number related to an important aspect of their lives. However, if this Count decreases to 0, the person will be dragged down into "the abyss", and is said to be dead for all eternity. For young Hina, her Count corresponds to how many hundreds of kilometers she has walked. Ever since her mother was dragged into the abyss, she has been searching for the Legendary Ace from her mother's last wish for the last five years. Hina's grueling journey takes a sudden turn when she meets a strange masked knight known as Licht Bach with a negative-numbered Count.
Characters
;Licht Bach Rihito Sakai ;Hina ;Lynn May ;Pele Poporo Gespenst Zerlegen ;Jail Murdoch ;Nana Bassler ;Mizuka Sonohara ;Alexandrov Grigorovich Alan ;Schmerman Bach ;Taketora Doan ;Tokikaze Sakai ;Saki Ichinose ;Genji Akui ;Kyouhei Suda ;Asumi Sumiya ;Kyouka Narumiya
Media
Manga
launched the manga in Kadokawa Shoten's shōnenmanga magazine on Monthly Shōnen Ace on December 26, 2014. On July 8, 2018, during their panel at Anime Expo, Yen Press announced that they had licensed the manga.
Chapters not in tankōbon format
Anime
An anime television series adaptation was announced by Monthly Shōnen Ace on February 18, 2018. The series was directed by Hiroyuki Kanbe and written by Masashi Suzuki, with animation by Geek Toys. Yuka Takashina, Yūki Fukuchi, and Hiroko Fukuda provided the character designs. Junichi Matsumoto composed the series' music. It aired from January 8 to June 24, 2020 on Tokyo MX, KBS, TVA, SUN, BS11, and AT-X. Miku Itō performed the series' first opening theme song "Plunderer," while Rina Honnizumi performed the series' first endingtheme song "Countless Days". Miku Itō performed the series' second opening theme song "Kokou no Hikari Lonely dark", while Honnizumi Rina, Ozawa Ari, and Itō Shizuka performed the series' second ending theme song "Reason of Life". Funimation acquired the series for distribution, and streamed the series on FunimationNow in English speaking regions, and on AnimeLab in Australia and New Zealand. Funimation premiered the first two episodes of the series on YouTube in the United Kingdom, Ireland, Australia and New Zealand on December 8, 2019. It ran for 24 episodes.