Assistant Teacher at a Girls Magic Academy(2019)

Mahou Joshi Gakuen no Suketto Kyoushi

Lou Brandel is a magician who possesses talents that can only be found in one person every few thousand years. One day, he saves the beautiful and noble young woman, Fran. As the principal of Magical Girls Academy, she appoints him to work there with her! His "interesting" life of being a powerful magician teacher now begins!

(Source: MANGA UP!)