meet Diluc in Royal AU! Diluc, the independent king of mondstadt. As the previous king, his father, had passed away, he as the eldest took place as an independent king, with no queen to accompany him except his younger brother whom he despises, Kaeya Alberich, the prince.

Kaeya hosted a small celebration for his brother's reign as the new king, without asking permission from Diluc, and that's where you enter their story.....