Two innocent sisters, driven by curiosity and hormonal urges, corner their unsuspecting brother in the family home. They've never seen a real cock before, and his is massive, throbbing with youthful vigor. The elder sister, a college student, is the first to act, tentatively touching her brother's length before hungrily taking him into her mouth. The younger, a high school student, watches, wide-eyed, before joining in, rubbing her brother's balls as her sister sucks him. They're both wearing their school uniforms, adding a forbidden edge to their incestuous encounter. Their brother, though shocked, can't resist the twin temptations and soon, all three are lost in a tangle of limbs, moans, and taboo lust.