In the first nude scene, a 16-year-old girl showers nude and we mostly see her breasts and the curvature of her butt because there is some shadowing. She touches her breasts as she washes. Her lover walks in while she's showering and touches her body.
In the following scene, they're having sex in bed with him on top, and we see her breasts in close-up. He touches and kisses her breasts, and she moans a lot.
Later in the film, she's standing alone in a room, takes off her robe to expose her breasts and bush to us, and gently touches her breasts with her eyes closed to arouse herself. In addition to the actual view of her, we also see her reflection in the mirror.