Césio 137 - O Pesadelo de Goiânia (1990)

Gabriela gets in the shower with Devair who's already naked, Afterwards they start to kiss passionately and Gabriela removes her upper dress leaving her in a shift dress that becomes sheer because of the water, we can then see a Close Up of his bare rear and a close up of her clothed rear.

Devair appears shirtless in multiple scenes.