It took five hundred lifetimes of looking back for us to meet each other in this life, but in the blink of an eye we were separated and forgotten... Maybe we didn't cherish it. If I hadn't met you, I wouldn't have regrets. Because in that case, I wouldn't have too many imaginations about the future. But after meeting you, I saw the future. In this way, there are many more "ifs" in the memory, but "if" itself is a kind of regret.