His Majesty is Vexed by His Handmaiden

Story

Oh, Your Majesty… Clayden A. Roccarso, the newly crowned ruler of the Empire of Roccarso, is the most sought-after bachelor in the land. With his striking looks, refined swordsmanship, and heroic victories against the monsters, he has captured the admiration of nobles and commoners alike. All but one. Emilia Valleta, his own handmaiden, remains completely unmoved by his charm, leaving him both intrigued and frustrated. Now, the young ruler must not only secure his empire, but also win the heart of the one woman who refuses to be impressed.

Synopsis via AniList (English).