Here Reigns the Vengeful Villainess

In the grand empire of Tygen, Robellia's serene life takes a dark turn, catapulting her into a saga of vengeance. In a world of power and intrigue, she exposes hidden truths, navigating a tumultuous path between hero and villain. Armed with extraordinary magic, Robellia is steadfast in unveiling the obscured secrets of the empire and recovering her lost happiness.

(Source: PocketComics)

Note: First released in English, with the initial eligible release in Japanese followed by Korean, making it a manga by our standards.