Many years later, when she recalled her youth, she thought it was as bland as water, and even she couldn't taste it. The only clear face is becoming more and more blurred in the withering of time. She once thought that the relationship between them was a garden, and going around and around would always return to the starting point. However, she was not good at mathematics and forgot that there is a relationship between circles, which is called separation. As they move further and further away, there will never be an intersection.