In the quiet of his room, a teenage boy finds himself alone with his thoughts and a growing ache in his groin. He's been feeling restless and horny all day, and now, with nothing to distract him, he can't ignore the throbbing in his pants any longer. He tentatively reaches down, rubbing himself through his jeans, before unbuttoning them and letting his hard cock spring free. He wraps his hand around it, stroking slowly at first, then faster, as he pictures the girl from his algebra class. He's so lost in his fantasy that he doesn't hear the door creak open, and it's not until he hears a gasp that he realizes he's not alone.