Harry Begins Anti-Dementor Training with Remus Lupin

Harry reminds Remus Lupin of his promise to teach him how to repel dementors. Lupin schedules their first lesson in the History of Magic classroom. Despite Harry's nerves, Lupin explains the Patronus Charm and the difficulty of mastering it. Harry is eager to start training, especially after worrying about dementors affecting the next Quidditch match.