Helck is a Japanese manga series written and illustrated by Nanaki Nanao. It was serialized in Shogakukan's Ura Sunday website and MangaONE service from May 2014 to December 2017, with its chapters collected in 12 tankōbon volumes. Shogakukan published 12 new edition volumes that feature color pages from the original series run and new covers from April 2022 to July 2023. Viz Media has released this edition in English since January 2023. An anime television series adaptation produced by Satelight aired from July to December 2023. Source: Wikipedia (en)