A pair of cute siblings, left home alone, start to notice each other in a new light. The brother can't help but steal glances at his sister's developing figure, while she finds herself drawn to his growing confidence. One evening, they're watching a movie together, their legs touching, the tension building. The sister leans in, her lips brushing against his cheek, then his mouth. They kiss, slowly at first, then with growing passion. Their hands start to wander, exploring each other's bodies, their breathing ragged as they lose themselves in their first taste of taboo love.