Morhange's single mother, Violette (Marie Bunel), arrives at the school. When Mathieu goes to explain that Morhange cannot be visited because he has been locked up as a punishment, he finds himself pitying and being attracted to the boy's beleaguered mother and instead tells her that Morhange is at the dentist. Meanwhile, a cruel, uncontrollable boy named Mondain () arrives and begins causing trouble by bullying the others and generally being rebellious. After stealing a watch, he is locked up for two weeks.