In this adult sibling fantasy, a man loses his girlfriend before they can have sex and shuts himself away in despair. His caring older sister enters and hesitantly offers her own body for practice, reasoning that if he hides her face, it is no different from another woman. He accepts, experiencing breasts, pussy, handjobs, and oral for the first time. What begins as pretend sex feels too good, and the adult siblings lose control of desire together.