During their hour of detention, Paul, Enzo and Gabriel expect to copy lines but their biology teacher, more perverse than ever, improvises a practical course of anatomy before inflicting them a punishment from another time.The innocent Gabriel Lambert is called to undress in front of his hilarious classmates to be used as an anatomical model in a true feat of exhibition. The high school student embarrassed by this unexpected situation shyly takes off his shirt but his teacher expects more. Gabriel blushes again and tries to argue when Mr. Marguet joining the gesture to the word drops down his pants and his underwear. The young man is now completely naked in front of his class and his teacher begins to describe his anatomy. M. Marguet gently pulls back the foreskin of Gabriel and explains the function of the glans before seeing that seminal fluid flows from the students urethra whos apparently as embarrassed as he is excited by the situation. Gabriel cannot hide his erection and Mr. Marguet who was waiting for it starts to masturbate him slowly and making the students cock growing in his hand. Enzo and Paul are captivated by the experience and cannot resist to slip a hand in