"The lovers under the street lamp are like us in the past, hugging and kissing affectionately, loving each other so hard that it's hard to let go and separate." Ye Nanxue heard this song for the first time when she met Gu Nanchao for the first time. At that time, Ye Nanxue thought that if she and Gu Nanchao were together, she would definitely not break up with him. So on the day he left, she smiled and said to him: Gu Nanchao, just pretend that we have never been together, and we will be friends from now on... Five years later, Gu Nanchao suddenly came back and appeared at her engagement party. He said: Ye Nanxue, it seems that we haven't broken up yet.