Silvio (the main character), Ponzi (his best friend) and a group of boys and girls that go to the same school.
The most radical kids end up setting the tone of the oncoming protest; the school is going to be occupied.
Martino tells the boys that he's had sex with his girlfriend, and that he can last about ten minutes.
On the other hand, as the girls chat, his girlfriend tells her friends that it was all very fast.
The next morning, as Ponzi comes to pick up Silvio at his place, he tells him that the school has been shut down and they're going to invade and occupy.
The school is taken, Silvio is exploring the grounds along with Martino's girl (who, we learn, is a long lost love interest of his).
The rumours of the archive kisses reach the girl's ear, now she thinks Silvio is just another boy.
At home, Silvio gets into an argument with his father and ends up not making it to the school.
As he chases a fascist down the street with a stick, his father stops him and take him home.
Some escape, but most of them get arrested: the jealousy-fueled Martino, the most exalted kids, Ponzi and most of the minor characters.
He consults his heartbroken brother and he tells him that he should only enjoy the girl but shouldn't fall in love with her.
Claudia takes him up to the rooftop, there they kiss and she asks him if he wants to make love right there.