I'm Quitting Heroing

I'm Quitting Heroing, shortened for 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. 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 by EMT Squared aired from April to June 2022.

Plot
In a medieval yet futuristic time, the Demon Queen Echidna and her forces have come from a polluted wasteland called Demon World. The world's strongest hero, Leo Demonheart, has defeated Echidna and her Elite Four. Sometime later, Leo shows up wanting to help Echidna rebuild her army because the human populace became fearful of him instead of celebrating his victory as some people worried that he would become the next demon king. As a result of his exile, Leo wants to help Echidna, but she violently rejects his offer. The Elite Four go behind her back by having Leo help rebuild Echidna's army anyway. He also learns that Echidna wants to obtain the Philosopher's Stone so that she can make the Demon World fertile again.