Cheat Shoujo ga Boukun Seiou ni Dekiai saresou desu ga, Ima wa Mahou ni Muchuu nan desu!!!

Even though Karen is the top student at the Magic Academy, she's also called the "Worst Genius" and is currently in danger of being expelled!!! The key to avoid the expulsion is the newly appointed Holy King, a dangerous, untouchable, complex tyrant with fiendish magic?! Rather than being afraid, Karen is in awe of the rare magic. A love comedy between the magic-obsessed Seal Master student, Karen, and the vicious tyrant of a Holy King begins! (Source: Ichijinsha, translated)