Fearsome Witch Teaches in Another World (Manga): Ms. Aois Lesson Plans Volume 4

After working with the newly reformed Rox, Aoi has discovered the hideout of a criminal organization running an underground casino. Word has it that some of Fiddich Academy's students have been going there and have fallen deep into debt. Aoi isn't about to let these students' lives be ruined by their predatory practices, though. She swoops in to take action. It's a battle between the entire criminal underworld of Winturbly and the fearsome Witch of the Academy.