High School Mystery: School of Seven Mysteries High School Mystery: Gakuen Nanafushigi is a Japanese anime television series directed by Shin Misawa and produced by Studio Comet. Details Casts Posters Season Lists Title High School Mystery: School of Seven Mysteries Genres Mystery Animation First Air Date 1991-04-12 Last Air Date 1991-05-17 Episode Runtime 00 Hours 25 Minutes Total Season(s) 1 Total Episode(s) on All Seasons 3 Runtime 25 Production Companies Studio Comet Michie Tomizawa... Mizuki Ichijô (voice)... Original Size (550x780) Original Size (2000x3000) Season 1 3 Episode(s) 1991-04-12