Marie-Luce Bison, 14 years old, is raised by her father in a cheerful boarding house for seniors where he is the director. It is soon the costume party of her new college: her father does not want her to go ... and anyway, she is not invited. But pushed by Albert, her 80-year-old best friend, Marie-Luce crashes the party, dressed as a man. That evening, everyone takes her for a boy... a boy who is looked at and who pleases. She then decides to invent a male double named Leo to finally live her teenage life. Of course, at home, the relationship with her father becomes complicated.
| Directing | Victoria Bedos | Director |
| Writing | Victoria Bedos | Screenplay |
| Writing | Eulalie Elsker | Co-Writer |
| Writing | Louis Penicaut | Screenplay |
| Production | Didier Carrel | Unit Production Manager |
| Art | Nicolas de Boiscuillé | Decorator |
| Production | Julie Navarro | Casting Director |
| Editing | Nathan Delannoy | Editor |
| Sound | Yves Bémelmans | Sound Engineer |
| Directing | Sébastien Matuchet | First Assistant Director |
| Camera | Pierre Aïm | Director of Photography |
| Production | Jean-Jacques Albert | Production Director |
| Crew | Diane Brasseur | Script |
| Costume & Make-Up | Marie Credou | Costumer |
| Production | Hélène Cases | Producer |
| Crew | Corinne Devaux | Choreographer |
| Sound | Martin Caraux | Music Supervisor |
| Editing | Cécile Perlès | Assistant Editor |
| Camera | Sébastien Rodriguez | Grip |
| Camera | Maxime Picoche | Steadicam Operator |
| Camera | Olivier Merckx | Steadicam Operator |
| Camera | Nicolas Mambourg | Best Boy Grip |
| Camera | Jean-Philippe Gosselin | Steadicam Operator |
| Camera | Tony Chapuis | Steadicam Operator |
| Sound | Yves Bémelmans | Sound |
| Sound | Etienne Carton | Dialogue Editor |
| Sound | Benoît De Clerck | Sound Editor |
| Art | Benjamin Gatti | Construction Coordinator |
| Production | Eva Curia | Executive Producer |
| Costume & Make-Up | Fabienne Adam | Key Makeup Artist |
| Art | Nicolas de Boiscuillé | Production Design |