I'm Quitting Heroing

To find out the cause of water pollution in the demon realm, Leo and Mernes head off to investigate Lake Amia and its resident water spirit, Undine. But one thing stands in their way—the legendary Demon King Slayer, who swears to protect Undine at all costs! Just who is this mysterious foe?! Meanwhile, Demon Queen Echidna puts her plan into motion, creating a fake identity to confer with Leo about her troubles. Her disguise is perfect, and there’s absolutely no chance Leo will see through it…right?

To take down Undine, the raging spirit polluting the demon realm’s waters, Leo and Echidna must enlist the help of the priestess Crocell. There’s just one problem—Crocell absolutely refuses to cooperate! As the former hero and the Demon Queen try their hand at negotiations, Echidna discovers just how important it is for a ruler to love her people…and why, perhaps, she—not Leo—is the one who belongs on the throne. Will Echidna regain her confidence in time to carry out their plan?! The fate of the demon realm rests on this final, epic confrontation!