Tensai Majo no Maryoku Kare

Nayu, a one-in-10,000 magic prodigy, has run out of mana! Now all the antics she got away with because of her magical skill are coming back to hit her like a boomerang... Until she meets her past student Komugi, the only one who actually likes Nayu as a person. This is a boomerang love-comedy of karmic retribution about a witch who is now painfully useless after exhausting her magical powers.

(Source: Sunday Webry, translated)

Notes:
- Originally self-published as a Twitter comic, it was picked up for serialization on Sunday Webry starting 2022-10-28.
- Included chapter 14.5