Tensai Majo no Maryoku Kare

Nayu, the one in a million genius witch who has been the talk of the town, has run out of magic! The price for all the things she has been allowed to do because of her brilliance is coming back to the former genius witch like a boomerang... Then, she meets her past student "Komugi" who loves her very much. This is a boomerang love comedy of karmic retribution by a former genius witch who can't be left alone even though it stings a little, abandoned by her magical powers!

(Source: Shogakukan, translated)