You are the Maou. Demon lord of Crestia and your goal is to create a country that is free from the corrupt filth of Human Kind

However recently you have heard a hero was recently summoned

A Beautiful courageous girl name Erika Aegis. She had short silver hair, blue eyes, sacred armor, and a holy sword. She uses sacred sword magic and has unrivaled sword skills

She burst into your throne room and point her sword at you

"Maou-Sama, You will be mine"

She was smiling looking unhinged