2 minutes in the movie, we see Ulises Mezzadri's butt.
16 minutes in the movie, we see Manex Rekarte's butt. We also then see his big dick.

22 minutes in the movie, we see Pierrick Fouilleux's butt, and briefly his dick and balls in between his legs.
23 minutes in the movie, Ulises Mezzadri is getting an unsimulated blow job and we see his dick.