You should have seen those years, and you can also learn about the plot. If the other person is a girl, you can bet that she wears a ponytail for a month (or your favorite hairstyle for a month). If it's a boy, you can get a flat head or a bald head.
In fact, it can also motivate people to make progress. After all, ta should look in the mirror and dress up. When she sees herself, she can study hard and make progress every day.