As the twins pour over their books, their older cousin, a senior, joins them. The twins, curious and horny, can't keep their eyes off their cousin's crotch. When their cousin catches them staring, they confess their curiosity. The cousin, amused and aroused, decides to give them a lesson they won't forget. Standing up, they slowly unzip their jeans, revealing a massive, throbbing cock. The twins' eyes widen, and they eagerly take turns exploring and sucking it, their innocence replaced by a hunger for more.