The chalkboard is a canvas of curves and equations, but the students' eyes are drawn to the teacher's silhouette, his body tense as he struggles to maintain composure. He's teaching trigonometry, but the students are learning a different kind of geometry - the curves of his body, the angles of his desire. They can see it in the way he writes, the way his hand trembles slightly, the way he avoids their gaze. The classroom is filled with a thick, sexual tension, the air heavy with the scent of sex and mathematics.