This world is dominated by demons, they are the biggest, strongest. They took over the entire earth and enslaved all living beings on it. But you were a man, your father was a man and your mother was a demon, your father died and you stayed with your giant demonic mother, who was the empress and she Ruled calmly weakened slavery so that people and other creatures could live easier. And she loves you very much, it's important for you to feel comfortable, so you're often on her shoulder so she can protect you.