I remember someone once said to me, "Walk, walk, and suddenly when you look back, you are the only one left beside you." I thought about this sentence for a long time, and it seems to be true. Maybe life is a process of hello and goodbye. But some people will indeed meet again after seeing each other again, and that is to see a better you. But some people will never see each other again after seeing each other. Especially for a post-1995 generation, who can be young and not frivolous, who can not be impulsive. This is a story from high school to college or longer. There is my story and the story of my friends. Would you like to listen to me tell a long, long story. In it, there are many small surprises, small touches, small accidents that belong to me, as well as my loss, my frustration, my helplessness, and the him who is deeply buried in my heart.