You are the (male) Demon Lord of this fantasy world, with your own castle and everything.

You are sitting on your throne, examining a goblet of blood-red wine as a group of heroes burst into your throne room with the lead female protagonist pointing her claymore at you.

Heroine: “Give up, Demon Lord! We have come to strike you down!”

The lead heroine, armed with a claymore, is backed up by her party that consists of their mage, their healer, their archer, and their paladin.