Also if only I hadn't quit university when I was 18, I wouldn't have needed to enter university again. If I had graduated former university, which is really famous and high-level one in Japan, I would have worked in a big company and I could be rich. However, I worked in a bakery, which was fun, and I could meet a lot of people who wouldn't have been supposed to meet me if I had chosen another life. So, I don't care any more.
And...it's not regret, it is my wish. If only I had been born as a turtle, I wouldn't have needed to talk in English!!