it sounded like the guy who fixed the wheel knew she was an idol and thats why he asked for the advertisement, which lead to the main guy confused and saying he doesn't follow world events. ;)
Looking back, she probably ran over to his house after something went wrong at home. It hints at something but she never says anything about it. Probably that's why she moved away too. It's amazing Key's able to capture the slow burn of school life while foreshadowing at the same time.