The demon who looked like an angel, Duke Valafar, was discriminated by other demons due to his appearance, causing him to become a shut-in in his castle. The only one by his side was an incubus subordinate. One day, when a blood-stained angel fell in his territory, he met Archangel Uriel. Kidnapped by Uriel, the fate of Valafar who was added to the harem is…!?