two points. First, she was immersed in a relationship that she longed for very much, or a boy who was far away from her suddenly showed her kindness. She was very moved, and later found out that the boy didn't really like her, but was just having fun. She woke up and returned to her former reserved and aloof mentality. She would no longer be condescending to others, and she was eager to contact and care for each other every day. Another point is that she suddenly found a fatal flaw in the boy she liked very much, such as playboy (who seemed to be so honest), such as lying (who turned out to be so sincere) and so on. Let her have an epiphany, it turns out that this person is not as perfect as before and has so many bad shortcomings. She returned to the mentality of not trusting people before.