Filthy love

A girl with purple hair and red sunglasses turns to face a smaller girl with black pigtails and red sunglasses, who points an accusing finger; the purple-haired girl then turns and walks away, followed by the smaller girl, as a blonde girl in a green sweater and red sunglasses appears at a doorway, looking surprised and gesturing with her hands before turning to face the camera with a shrug. The scene takes place in a hallway with a wall of mailboxes.