Gleipnir (Japanese: グレイプニル, Hepburn: Gureipuniru) is a Japanese manga series written and illustrated by Sun Takeda. It was serialized in Kodansha's seinen manga magazine Young Magazine the 3rd from October 2015 to April 2021, and transferred to Monthly Young Magazine in May 2021. Its chapters have been collected in twelve tankōbon volumes as of June 2022. The manga was licensed by Kodansha Comics in North America. An anime television series adaptation by Pine Jam aired from April to June 2020.