Re:Monster is a Japanese light novel series written by Kogitsune Kanekiru and illustrated by Yamaada. It was serialized online between May 2011 and 2018 on the user-generated novel publishing website Shōsetsuka ni Narō. It was later acquired by AlphaPolis, who have published nine main volumes, a side story volume and an extra volume between August 2012 and August 2017. A manga adaptation with art by Haruyoshi Kobayakawa has been serialized online via AlphaPolis' manga website since March 2014 and has been collected in 13 tankōbon volumes. The light novel is licensed in North America by Hanashi Media, while the manga is licensed by Seven Seas Entertainment. A sequel light novel series written by Kanekiru and illustrated by Naji Yanagida, titled Re:Monster: Ankoku Tairiku-hen, began publication by AlphaPolis in July 2018, with five volumes released so far. An anime television series adaptation produced by Studio Deen aired from April to June 2024. A second season has been announced.