Sirius refuses to let Remus’s illiteracy slide, convincing him to listen while he reads A History of Magic aloud. The unexpected study session sparks a rare moment of calm between them—until dinner, when a bag of “sweets from Peter’s mum” turns out to be a Slytherin prank. Soon, James, Sirius, and Remus are sprouting thick black hair all over, to the great amusement of the entire Great Hall.