The video features a nerdy guy named Quarto who is completely captivated by his sisters' naked body on the computer screen. As he stares at her, he becomes increasingly turned on and starts to touch himself in response to her presence. Rosinha and Sozinhos, his sisters, are oblivious to his actions as they continue to play a game on the computer. Quarto, however, can't resist the urge to explore his sisters further and starts to undress himself, revealing his hardened penis. As he continues to watch her, he begins to masturbate, his breathing getting heavier and heavier. The sisters eventually notice him and are shocked to see him in this state. They try to get him to stop, but he is too turned on to listen. The video ends with Quarto continuing to pleasure himself, completely lost in his own world of desire.