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Between 5th January 1991 and 2nd November 1991, a 26-episode anime based on the St. Clare's stories was broadcast in Japan under the title "Ochame na Futago Clare Gakuin Monogatari.[2]" This anime has been translated into German as Hanni und Nanni, into French as 'Les Jumelles de St-Clare, into Spanish as Las Gemelas de St. Claire and into Italian as Una scuola per cambiare.

St. Clare's is a series of six books written by British children's author Enid Blyton about a boarding school of that name. The series follows the heroines Patricia ("Pat") and Isabel O'Sullivan from their first year at St. Clare's on. Other characters include Alison O'Sullivan (the twins' cousin), Hilary Wentworth, Carlotta Brown (an ex-circus girl), Janet Robins,Doris Elward and Bobby Ellis.