A curious Brazilian teen, Garoto, discovers the power of his massive uncut cock when he accidentally catches his sister masturbating. Her moans of pleasure egg him on, and he can't help but stroke his throbbing pica until it's rock hard. His sister, enticed by his thick caralho, begs him to fuck her, but Garoto, unsure and inexperienced, hesitates, leaving them both on the edge of a taboo encounter.