The Fearsome Witch Teaches in Another World (Manga): Ms. Aoi’s Lesson Plans Volume 3 by Mitsuru Inoue

To the shock of everyone at Fiddich Academy, Aoi has earned the respect of Vahtedd’s king and queen, and she’s brought their son Rox to heel. Now, she’s teaching her own class on sorcery fundamentals to a small group of bright, eager students—too small. Someone is working behind the scenes to discourage anyone else from attending. If she is to advance sorcery as she’s always dreamed, the Fearsome Witch of Fiddich will have to find the culprit. Good thing she’s willing to get to the bottom of this mystery by any means necessary!