Several children who grew up together in the same city, the years they spent together, the roads they walked, time has changed, and when he or she looks back again, the person in his memory has long changed. The various feelings and dreams he once insisted on have been shattered by the ravages of reality. The road ahead is unclear, and he can't find the direction, human nature, or impulsive regret, despair, and the desire to not look back. Love, inability to love, hate, endless, I don't know who hurt whom, or simply want to make the other person live a better life. I am here, waiting for your explanation, but you have deceived me again and again. I promise you some things, and please forget me and that we have ever met.