Gosick

A Fool Designates His Own Mouthpiece (1x13)

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Kujo and Avril explore one of the school's towers and Avril figures that it is related to the legend of Leviathan, an alchemist who lived there decades before. Victorique stumbles on a pop-up book containing a cryptic message aledgely from Leviathan himself and when a death occurs at the top of the tower, she decides to investigate by herself.