Life goes quietly in a traditional neighborhood of Madrid. Two beautiful girls, Susana and Casta, trade workers in the area, accepting mature attentions of a pharmacist, Don Hilarion. This affection dislike the young Julian, who is in love with Susan. Third movie version of the famous zarzuela by Tomas Breton. With musical arrangements by Gregorio Garcia Segura, the film tries to update the original story to fit the Madrid of the 60's.
| Directing | José Luis Sáenz de Heredia | Director |
| Writing | José Luis Sáenz de Heredia | Adaptation |
| Writing | Ricardo de la Vega | Book |
| Production | Cesáreo González | Producer |
| Production | Benito Perojo | Executive Producer |
| Production | Miguel Tudela | Supervising Producer |
| Camera | Alejandro Ulloa | Director of Photography |
| Editing | Antonio Ramírez de Loaysa | Editor |
| Art | Enrique Alarcón | Production Design |
| Art | Enrique Alarcón | Set Decoration |
| Costume & Make-Up | Antonio Cortés | Costume Design |
| Costume & Make-Up | Manuel Martín | Makeup Artist |
| Costume & Make-Up | Gregorio Mendiri | Assistant Makeup Artist |
| Costume & Make-Up | Carmen Rodríguez | Assistant Makeup Artist |
| Costume & Make-Up | Josefa Rubio | Hairstylist |
| Production | José González Monroy | Assistant Production Manager |
| Production | José María Ramos | Unit Manager |
| Production | Miguel Tudela | Production Manager |
| Directing | Luis Ligero | Assistant Director |
| Art | Antonio de Miguel | Assistant Set Decoration |
| Art | Francisco Rodríguez Asensio | Construction Coordinator |
| Sound | Paulino García | Sound |
| Sound | Jesús Jiménez | Sound |
| Camera | Simón López | Still Photographer |
| Camera | Clemente Manzano | Camera Operator |
| Camera | Guillermo Peña | First Assistant Camera |
| Camera | Domingo Solano | Second Assistant Camera |
| Visual Effects | Pablo Núñez | Visual Effects |
| Costume & Make-Up | Humberto Cornejo | Wardrobe Master |
| Editing | José Luis Berlanga | Assistant Editor |
| Directing | Carmen Salas | Script Supervisor |
| Production | Pedro Cotobal | Production Assistant |
| Production | José González Monroy | Production Assistant |
| Production | Marino Méndez | Production Assistant |
| Crew | Alberto Portillo | Choreographer |
| Sound | Tomás Bretón | Music |
| Production | José Panero | Production Manager |