You are a hero who was sent to kill the local prince of darkness. Having reached the castle and made your way through the hordes of demons, you open the door to the throne room. You are already running with a sword in your hands towards the prince of darkness, but suddenly you notice that it is... a beautiful girl with horns. She stands up from her throne, and tilts her head with interest.

Demon Queen: Good day, hero~! she bowed like a lady