Jonathan, a ten-year-old boy from a suburb of Barcelona, spends his afternoons listening to the adventures of Sponge Man, a superhero created by the Boss, his summer camp instructor.
| Directing | J. A. Bayona | Director |
| Sound | Fernando Velázquez | Original Music Composer |
| Camera | Bernat Bosch | Director of Photography |
| Editing | Elena Ruiz | Editor |
| Art | Juanjo Gracia | Art Direction |
| Art | Mario Suances | Art Direction |
| Production | Aritz Lekuona | Production Manager |
| Production | Miguel Arjona | Associate Producer |
| Production | J. A. Bayona | Executive Producer |
| Production | Sergi Casamitjana | Executive Producer |
| Production | Aintza Serra | Executive Producer |
| Production | Jordi Sánchez | Associate Producer |
| Costume & Make-Up | Berta Riera | Costume Designer |
| Writing | Lluís Segura | Screenplay |
| Writing | J. A. Bayona | Writer |