In several different scenes, the young choirmaster appears shirtless, with a bed sheet wrapped around his waist. This always takes place in the presence of teenage girls, who are either fully clothed or also wearing bed sheets wrapped around their breasts, so their nudity is not shown. The only exception is about three seconds of female rear nudity in a changing room.
Here and there, teenage girls from the choir show verbally and nonverbally that they are attracted to their choirmaster. There are also some very subtle hints that there might be something sexual going on between him and some of them.