Isekai Ten'i Shite Kyoushi Ni Natta Ga, Majo To Osorerareteiru Ken - Aoi-Sensei No Gakuen Funtou Nisshi summary:

Aoi is a new teacher who has been transported to another world.Aoi is picked up by Owen, an elf, and as they live together, Aoi masters more and more of Owen's magic and even surpasses him. In order to refine her magic further, she is assigned to teach at the Fiddick Academy, a school of magic!Aoi starts her teaching career showcasing overwhelming magical abilities, and she is not daunted by the aristocratic troublemakers who dominate the academy.However, her abilities have become the talk of the school...Aoi's life as a new teacher at the academy begins with a tumultuous start...!