Song of Youth
Canción De Juventud (original)
A town in the Catalan coast hosts two luxury schools: one for boys, run by Don Cesar, a man of antiquated customs, and a female one, run by two nuns, with modern ideas about education. They try to convince D. Cesar that boys and girls should have a healthy friendship. A finding by the sea is the perfect opportunity for students to prove that beautiful human relationship.
Starring Rocío Dúrcal, Julio Sanjuán, Margot Cottens, María Fernanda D'Ocón, Carlos Estrada, Helga Liné, Carmen de la Maza, Conchita Goyanes
It's a comedy and music movie, and has a rating of 6.2 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Italy.