In 'I Became a Calamity-Level Villain in the Magical Girl Universe,' follow the thrilling tale of a protagonist who finds themselves as the villain in a magical girl manga, only to realize that the magical girls in this universe are unexpectedly weak. With elements of action, adventure, fantasy, harem, romance, slice of life, and supernatural, this web novel is a must-read for fans of clever protagonists, demons, handsome male leads, magical girls, and overpowered protagonists.