No, with the Protection of the Brave, He Is Still so Good

This is a world of swords and magic, and a story of a brave man vs. A demon king. As the previous hero, Leo lost the protection of the hero after his success in defeating the Demon King. But Leo also wants to resolve the centuries-old war between demons and humans. Unfortunately, a new hero appeared, and his desire to kill the demons reached a twisted level. What's even more uncomfortable is that a mysterious religious group has appeared out of nowhere and is constantly causing trouble for humans and demons... Where should Leo go? Is this the only way he can use it? (The introduction is too weak, please move to the text)