Olivia, the main character, undergoes four costume changes throughout the film to depict flashbacks from different periods of her school life. She wears her school uniform, PE uniform from lower school, and casual clothes representing younger ages. Peter, her co-actor, only has one costume - a stereotypical flamboyant outfit to portray his role as a homosexual. Makeup and hair for the main characters is kept natural to maintain realism, while extras are costumed to depict popular or unpopular roles.