I'm Quitting Heroing: Next Gig Is at the Demon Queen's Castle is a Japanese fantasy light novel series written by Quantum and illustrated by Hana Amano. It was serialized online from January to February 2017 on Kadokawa's user-generated novel publishing website Kakuyomu. It was later published by Fujimi Shobo with three volumes from December 2017 to October 2018 under their Kadokawa Books imprint. A manga adaptation with art by Nori Kazato has been serialized online via Kadokawa Shoten's Young Ace Up website since May 2018 and has been collected in eight tankōbon volumes. Both the light novel and manga are licensed in North America by Kadokawa, with Yen Press handling the manga's physical release. An anime television series adaptation produced by EMT Squared aired from April to June 2022.