Katsute Mahou Shoujo to Aku wa Tekitai shiteita.

The Magical Girl and the Evil Lieutenant Used to Be Archenemies

The manga tells the story of Mira, who leads an evil organization trying to take over and destroy everything. Earth is under attack, but a magical girl named Byakuya Mimori stands up to Mira’s group. As they face off, something unexpected happens—Mira falls in love with Mimori.

(Source: MAL News)