The entire film was shot in only 5 hours, (after and before the rush hour) on the shortest metro line in Paris.
Each take was a long shot that lasted 6 minutes in order to respect the continuity.
In order to keep continuity, the whole crew had to "mirror" the set in less than two minutes, every 14 minutes. As the metro went back and forth on the same line.
The film was selected as "Coup de Coeur" among 1800 other shorts at the Short Film Corner, at the Cannes Film Festival 2017.