Frøken Nitouche (1958)

Célestin, the organist of a convent, has written and composed a light operetta under the name of Floridor. One day, the Mother Superior asks him to chaperone one of the boarders, Denise de Flavigny, who is returning home to get married. Denise appears to be stunningly attractive - and things get even more complicated when Célestin starts courting Corinne, the star of his operetta.