I'm Quitting Heroing Manga Volume 8 features story by Quantum and art by Nori Kazato and Hana Amano.

In order to protect the peace of the demon realm, Aquarius, along with the Hero, Leo, Demon Queen Echidna, the water priestess Crocell, and the Four Great Guardians, prepare to take action. Will Aquarius be able to rescue her good friend Undine from her rampage?! The tale of reviving the Demon Queen’s worn-out army comes to a thrilling conclusion!