A dark story about obsession, cats, and birthday presents.
Unfortunately the movie Happy Birthday to You! is not yet available on HBO Max.
| Writing | David Alcalde | Screenstory |
| Production | Victor Mata | Producer |
| Art | Marta Bazaco | Assistant Art Director |
| Editing | Koldo Idígoras | Editor |
| Costume & Make-Up | Patricia Martínez | Costume Supervisor |
| Writing | David Alcalde | Screenplay |
| Crew | Juan Serrano | Special Effects |
| Crew | Arturo Balceiro | Special Effects |
| Costume & Make-Up | Eva Sanz | Makeup Artist |
| Writing | Hernán Migoya | Comic Book |
| Costume & Make-Up | Patricia Martínez | Costume Design |
| Crew | Rafael García | Cinematography |
| Sound | José Battaglio | Music |
| Sound | Caelo del Río | Music |
| Crew | Raquel Guirro | Special Effects |
| Directing | German Blanco | Assistant Director |
| Art | Roser Vila-Abadal | Assistant Art Director |
| Directing | David Alcalde | Director |
