Among the passers-by of youth, you are the most difficult to forget. Love starts when you say you love me and ends when I say I love you. In those fleeting years, in his youthful and ignorant emotions, Guo Jianuo used all his love to weave a beautiful dream for Su Mingwei. However, when Su Mingwei wanted to fall asleep and never wake up again, Guo Jianuo told her by leaving that it was time to return to reality! No matter how hard Su Mingwei tried, she could not undo the bad ending. Only when they reunited eight years later did she truly understand that the most cruel thing in love is time. It makes us suffer from regrets but never gives us any chance to make up for it.