Mysterious poster with phone number puzzles Montrealers

A mysterious ad is plastered all over Montreal with a photo of a girl and a phone number. I have no further details, but several people find this poster very intriguing. I did not call or text the number that can be seen on the sheet: 438-525-4744. If you have the courage to do so, can you write in the comments on the Facebook page of Petit Petit Gamin what happens.

(picture taken by Jordan dupuis)