Manager takes an interest in Klara and wants to help her better understand human behavior. While she simplifies her explanations for Klara, the implication is that Coffee Cup Lady and Raincoat Man used to be lovers or perhaps old friends, but they didn’t see each other for a while, and so when they reunite, they are happy to see each other again but also sad, either about how long it’s been or about the circumstances that led to their lack of contact.