"What's Wrong with You, Duke?" is a completed Korean manhwa/webtoon series written by Bandalbanji and illustrated by Eddie. The story centers on Duke Dreux of Faucigny, who is initially cruel but becomes lovestruck and emotionally volatile due to a magic spell cast on him just as he was about to execute the protagonist, Nöel. The spell causes his moods to swing dramatically between passionate declarations of love and cold threats of death. Nöel, exhausted by this emotional whiplash, must find a way to save herself and their enchanted marriage before the spell's power fades and she loses the bewitched Duke forever. The series blends romance, fantasy, comedy, drama, and historical elements, and it explores themes of magic and time travel
. In summary, the "Duke" in the title refers to Duke Dreux, whose strange behavior and mood swings are caused by a magical curse, which is the core conflict of the story.
