Searching for a specific (spanish?) porn movie

I'm looking for a specific porn video (I think it was a movie) that I found a few years ago and lost over time.

Here is what I know about it:
- I found the video full length on PornHub
- the story is about a girl who "discovers" sex through her boyfriend and gets more and more into it
- as the movie progresses they do harder stuff, she learns to like masochism, and there's even a exhibitonistic scene later, where he leads her through the city naked with a leash
- I 100% recall a scene where one can see them both fucking doggy against an ornamental glass door from outside through said door
- the video is done kind of in the way of a documentary, with voice-overs from her
- I think (not sure) the movie was spanish/plays in Spain
- I think (not sure) the movie was named after the girl about which it is

The picture is not from the movie (I guess), but NTP does not let me create posts without a picture. Also it kind of displays the scene I meant before, where the guy leads her on a leash through the city.