Kuromajo-san ga Tooru!!

Ms. Black Witch's Halloween (Part 1) (1x19)

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In the run up to halloween, Chiyoko learns from Touka that police from the Spirit World are hidden throughout the town, meaning Gyubid is still around town somewhere. They manage to find her in an antiques store. They are confronted by the Spirit World Police, but are aided by Akuma Joe, who tells of a conflict between the Public Magic School Gyubid graduated from and the Black Witch Academy, who got the police on their side. Feeling guilt for allegedly causing her school trouble due to her actions, Gyubid decides to travel to the Spirit World to help her school, with Chiyoko and Touka deciding to come along.