Living under the same roof, an older sister and her much younger brother find themselves in an awkward yet arousing predicament. The sister, a curious and liberated woman, stumbles upon her brother's hidden stash of adult magazines. Intrigued, she can't help but flip through the pages, her imagination running wild. Meanwhile, her brother, unaware of her snooping, is in the midst of his own exploration, discovering the pleasures of his own body. One day, as he lies in bed, pleasuring himself, he hears a soft knock at his door. His sister enters, her eyes wandering to his exposed, throbbing cock. In a moment of shared curiosity and desire, they decide to explore their taboo attraction.