As Lucy and Brett begin dating, she forces him to spend more time with her. Brett's friends recognize that Lucy is good neither for Brett nor for them at all ("Bad News"). Evan promises to help to get Brett and Kendra back together so that he can get back on everyone's good side. Archie, fearing that this is a lost cause, begs Patrice to help Evan. She tells Archie she is not going, but he knows she's lying. When Patrice gets there, she surprises Evan by helping him help Brett, but instead of telling Brett what to say to Kendra, they end up telling each other that they are sorry, but Brett is oblivious ("Tell Her"). Brett takes their advice, and when he learns that Lucy and Kendra are fighting over him, he interferes and makes a feeble attempt to get Kendra back, and to his surprise, she forgives him. Meanwhile, Lucy learns of it and won't take the hit. She spreads a rumor that Kendra is cheating on Brett with Evan, and then gets Evan and Kendra in the same place so that Brett can catch them ("It Can't Be True"). Her plan works, and Brett lashes out at Evan. Evan, finally having enough of Brett, stands up to him and says that Archie and Patrice are his real friends. After Brett insults Archie and Patrice, Evan shoves him, and Brett punches him in the nose, giving him a nosebleed. Patrice immediately rushes to Evan's aid. Kendra shows kindness towards Archie before running after Brett. Evan wants to call off the Bar Mitzvah because it would only be him, Patrice, and Archie, but Patrice and Archie point out it that won't be that bad, and Evan starts to agree. He surprises Patrice with a kiss, and she surprises him back ("If That's What It Is"). Evan has his Bar Mitzvah after all; he is starting to understand what growing up means, and the characters tell of what surprises turning thirteen brought for each of them ("A Little More Homework"). Evan tells the audience that he is "thirteen years old. And [he's] just getting started."