I'm a Demon Lord, but It's My First Time Being Imprisoned

I was reincarnated as a demon king who gets torn to pieces after kidnapping, imprisoning, and defiling the hero. At this rate, I'm destined to die the quickest death in demon king history. I decided to change my fate. I even gave the hero treasures and left the gates open. But…. * The hero stood there with a crooked posture, flicking the collar around his neck as he spoke. “If you’re going to imprison someone, you should restrain them, spank their ass, brainwash them through training, make them imitate animals, or something!” Huh…? Me…? Do something so lewd…? The words coming from the hero's mouth were a feast of obscene terms. “God, don’t you think about how I feel, being captured an...