In the quiet of a shared apartment, a brother and sister find themselves alone, their eyes wandering to the forbidden fruit that is each other. The teen sister, her body ripe with youth, can't help but admire her brother's physique as he walks around in just boxers. She sneaks peeks at his growing bulge, her curiosity piqued. Meanwhile, her brother, equally enticed by her developing curves, tries to hide his arousal. As the tension builds, they both find solace in self-pleasure, but it's not long before their eyes meet, and the desire to explore each other becomes too strong to resist.