At the beginning of the movie, Mario Casas and Yon González are shirtless at the beach.
4 minutes in the movie, Yon González undresses. We see his cute butt. Then Mario Casas undresses too, and we also see his butt.
21 minutes in the movie we can admire Maxi Iglesias' hairy butt as he is making love to a girl.

15 minutes in the movie, Álex González leaves his bed and reveals his naked body. First we see his very nice bubble butt and after a while in order to dress up, he turns around and reveals his nice uncut penis. We get to see it for a few seconds as he takes time to dress up. It is the only scene in the movie with total nudity from Álex González.