"Why did you come back?"
When they reunited five years later, Su Tu didn't know how to answer when he asked this question. She originally thought that they had become a thing of the past, but she didn't expect that he still remembered...
A relationship in their youth has bound the two of them throughout their lives. One cannot let go, and the other cannot forget.
Intention: Only when you meet again after a long separation do you realize how much you can't let go of that person.