Nani mo shiranai sai kowa maō, to ai yūsha ni torawareru

Summary

The most fearsome demon king who knows nothing is captured by the hero who loves him dearly.She was kissed, her br*asts and private parts were exposed, and she couldn't resist the pleasure for the first time... The Demon King who had reigned with overwhelming power is now dominated by the Hero... "I won't kill you. You're mine." What is the Hero's true purpose?