The classroom, stiflingly hot, becomes a stage for a forbidden lesson. A young student, innocent yet curious, approaches his brother-in-law, a rugged older student, drawn to the size of his cock straining against his pants. The older one, initially hesitant, then excited, begins to teach the younger one the ropes of gay sex. He guides the eager student's hand, then his mouth, as the younger one hungrily sucks his cock, learning the rhythm, the taste, the feel of another man's pleasure.