Nobody talks about this one. That needs to stop. Gakuen Nanafushigi builds genuine dread through everyday school spaces transformed into sites of real horror, where each mystery isn't a puzzle to solve but a violation you witness. The show understands that the scariest thing isn't a jump scare or a monster reveal, it's the wrongness that lingers after the episode ends, the sense that something fundamental about the world these kids live in has been poisoned. You watch characters discover things they can't unknow, in hallways that will never feel safe again. This is horror that respects your intelligence enough to let discomfort do the work most shows waste jump scares on.
High School Mystery: Gakuen Nanafushigi is a 1991 horror and mystery TV.