Annick is disgusted by the upcoming frog dissection, and suggests stealing the batrachians, in exchange for 1h of tutoring with her. The boys need nothing more to take on the challenge! "The VP's niece" is again sidelined from the plans. Between two trips to the restroom because of sharp period pains, Simone tells Michèle she should show them she's not a goody-two-shoes by stealing them herself.

Michèle's parents are worried she hasn't come home yet. The Principal gives Bellanger an ultimatum: if Michèle did start the rumors about Jeanne, he wants to talk to her today. When Paul learns that she has eloped with his protégé, he goes looking for them. But in fact, he admires their boldness… The students improvise a surprise-party at Pichon's to celebrate the end of the school year!