Kuromajo-san ga Tooru!!

Ms. Black Witch's Halloween (Part 3) (1x21)

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As Gyubid is put on trial, Chiyoko receives evidence from Melusine that can prove Gyubid's innocence. With help from Touka and a few others, Chiyoko breaks out of prison and arrives at the court room, revealing a letter Leonare wrote explaining how Gyubid was set up by him and managing to get Exnome to testify about its authenticity. After Leonare is taken into custody, the judge decrees that Gyubid should not leave Chiyoko's side until she graduates as a black witch.