A 27-year-old woman with an average career only had a relationship three years ago that lasted for five years. In the past three years, there was nothing. One time, she accidentally looked at the photo album of her ex-boyfriend and saw that he and the mistress (who was also her best friend in college) lived happily. Anger welled up. Everyone said that they would definitely have retribution, and she would definitely Happiness can be achieved. I am the only one who is sad. What went wrong? Why is God so unfair? Then God seems to have heard it, because when I woke up the next day, I found myself back in the past. Before we broke up, my hope was rekindled to get rid of the cowardly self in the past. Why should I give up my happiness to others.