From all the songs in this movie there is only one actually written by Tanguito: "Natural" (1970). Most of the songs have been written specially for the movie (20 years after the death of Tanguito), and only other 3 songs had been created around 1970: "Presente" (Vox Dei, 1969), "El oso" (Moris, 1970) and "Me gusta ese tajo" (Spinetta, 1972)
In the movie, Moris (Mauricio Birabent) is played by the son of the musician, Antonio Birabent. He sings "El oso", a song written and published by his father in 1970.