A brother and sister, both students, find themselves alone in their shared room, their sibling bond deepening into something more intense. As they study together, the sister can't help but notice her brother's growing attraction, his gaze lingering on her body. One night, as they're supposed to be sleeping, she reaches out to touch him, feeling his hardness through his pants. Their exploration of each other's bodies begins tentatively, but quickly escalates into a passionate, taboo love-making session.